{
  "name": "DOT hazmat placarding requirements by hazard class (any-quantity vs. 1,001 lb threshold)",
  "description": "A shipment of hazardous material must be placarded on the transport vehicle, and which placard applies -- and whether it is required at any quantity or only once the aggregate gross weight of that class crosses 1,001 lb (454 kg) -- is fixed by two tables in one regulation, 49 CFR 172.504(e). Table 1's eight categories (explosives 1.1-1.3, poison gas, dangerous-when-wet, temperature-controlled organic peroxide, poison-inhalation-hazard, radioactive) require the named placard regardless of quantity. Table 2's fifteen require it only above 1,001 lb -- but that exception is a highway/rail exception that does not reach bulk packagings, which need a placard at any quantity, so every record carries the general rule and the exception's own scope alongside the number. Each record is one hazard-class / placard pairing. Answers 'do I need to placard this shipment', 'how much of this hazard class triggers a placard', 'which placard goes with hazard class 5.1'.",
  "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/",
  "licence": "US federal regulation \u2014 17 USC 105, no copyright",
  "last_verified": "2026-09-16",
  "stale_after": "2027-02-15",
  "sources": [
    "https://www.ecfr.gov/current/title-49/section-172.504"
  ],
  "records": [
    {
      "category": "1.1",
      "hazard_class": "1.1",
      "placard_name": "EXPLOSIVES 1.1",
      "placarding_threshold": "any quantity",
      "placard_design_section": "172.522",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "id": "1-1",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/1-1/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "1.1 | EXPLOSIVES 1.1 | 172.522",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "1.2",
      "hazard_class": "1.2",
      "placard_name": "EXPLOSIVES 1.2",
      "placarding_threshold": "any quantity",
      "placard_design_section": "172.522",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "id": "1-2",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/1-2/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "1.2 | EXPLOSIVES 1.2 | 172.522",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "1.3",
      "hazard_class": "1.3",
      "placard_name": "EXPLOSIVES 1.3",
      "placarding_threshold": "any quantity",
      "placard_design_section": "172.522",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "id": "1-3",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/1-3/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "1.3 | EXPLOSIVES 1.3 | 172.522",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "1.4",
      "hazard_class": "1.4",
      "placard_name": "EXPLOSIVES 1.4",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.523",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "1-4",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/1-4/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "1.4 | EXPLOSIVES 1.4 | 172.523",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "1.5",
      "hazard_class": "1.5",
      "placard_name": "EXPLOSIVES 1.5",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.524",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "1-5",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/1-5/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "1.5 | EXPLOSIVES 1.5 | 172.524",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "1.6",
      "hazard_class": "1.6",
      "placard_name": "EXPLOSIVES 1.6",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.525",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "1-6",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/1-6/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "1.6 | EXPLOSIVES 1.6 | 172.525",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "2.1",
      "hazard_class": "2.1",
      "placard_name": "FLAMMABLE GAS",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.532",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "2-1",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/2-1/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "2.1 | FLAMMABLE GAS | 172.532",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "2.2",
      "hazard_class": "2.2",
      "placard_name": "NON-FLAMMABLE GAS",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.528",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "2-2",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/2-2/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "2.2 | NON-FLAMMABLE GAS | 172.528",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "2.3",
      "hazard_class": "2.3",
      "placard_name": "POISON GAS",
      "placarding_threshold": "any quantity",
      "placard_design_section": "172.540",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "id": "2-3",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/2-3/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "2.3 | POISON GAS | 172.540",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "3",
      "hazard_class": "3",
      "placard_name": "FLAMMABLE",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.542",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "3",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/3/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "3 | FLAMMABLE | 172.542",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "4.1",
      "hazard_class": "4.1",
      "placard_name": "FLAMMABLE SOLID",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.546",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "4-1",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/4-1/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "4.1 | FLAMMABLE SOLID | 172.546",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "4.2",
      "hazard_class": "4.2",
      "placard_name": "SPONTANEOUSLY COMBUSTIBLE",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.547",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "4-2",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/4-2/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "4.2 | SPONTANEOUSLY COMBUSTIBLE | 172.547",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "4.3",
      "hazard_class": "4.3",
      "placard_name": "DANGEROUS WHEN WET",
      "placarding_threshold": "any quantity",
      "placard_design_section": "172.548",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "id": "4-3",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/4-3/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "4.3 | DANGEROUS WHEN WET | 172.548",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "5.1",
      "hazard_class": "5.1",
      "placard_name": "OXIDIZER",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.550",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "5-1",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/5-1/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "5.1 | OXIDIZER | 172.550",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "5.2 \u2014 Organic peroxide, Type B, liquid or solid, temperature",
      "hazard_class": "5.2",
      "class_qualifier": "Organic peroxide, Type B, liquid or solid, temperature controlled",
      "placard_name": "ORGANIC PEROXIDE",
      "placarding_threshold": "any quantity",
      "placard_design_section": "172.552",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "id": "5-2-organic-peroxide-type-b-liquid-or-solid-temperature",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/5-2-organic-peroxide-type-b-liquid-or-solid-temperature/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "5.2 (Organic peroxide, Type B, liquid or solid, temperature controlled) | ORGANIC PEROXIDE | 172.552",
      "verified_fields": [
        "class_qualifier",
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "5.2 \u2014 Other than organic peroxide, Type B, liquid or solid",
      "hazard_class": "5.2",
      "class_qualifier": "Other than organic peroxide, Type B, liquid or solid, temperature controlled",
      "placard_name": "ORGANIC PEROXIDE",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.552",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "5-2-other-than-organic-peroxide-type-b-liquid-or-solid",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/5-2-other-than-organic-peroxide-type-b-liquid-or-solid/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "5.2 (Other than organic peroxide, Type B, liquid or solid, temperature controlled) | ORGANIC PEROXIDE | 172.552",
      "verified_fields": [
        "class_qualifier",
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "6.1 \u2014 material poisonous by",
      "hazard_class": "6.1",
      "class_qualifier": "material poisonous by inhalation",
      "placard_name": "POISON INHALATION HAZARD",
      "placarding_threshold": "any quantity",
      "placard_design_section": "172.555",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "id": "6-1-material-poisonous-by",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/6-1-material-poisonous-by/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "6.1 (material poisonous by inhalation (see <https://www.ecfr.gov/current/title-49/section-171.8> \u00a7 171.8 of this subchapter )) | POISON INHALATION HAZARD | 172.555",
      "verified_fields": [
        "class_qualifier",
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "6.1 \u2014 other than material poisonous by",
      "hazard_class": "6.1",
      "class_qualifier": "other than material poisonous by inhalation",
      "placard_name": "POISON",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.554",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "6-1-other-than-material-poisonous-by",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/6-1-other-than-material-poisonous-by/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "6.1 (other than material poisonous by inhalation) | POISON | 172.554",
      "verified_fields": [
        "class_qualifier",
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "6.2",
      "hazard_class": "6.2",
      "placard_name": "NONE",
      "placarding_threshold": "no placard specified for this class",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "id": "6-2",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/6-2/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "6.2 | NONE |",
      "verified_fields": [
        "hazard_class",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "7",
      "hazard_class": "7",
      "class_qualifier": "Radioactive Yellow III label only",
      "placard_name": "RADIOACTIVE",
      "placarding_threshold": "any quantity",
      "placard_design_section": "172.556",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "id": "7",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/7/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "7 (Radioactive Yellow III label only) | RADIOACTIVE 1 | 172.556",
      "verified_fields": [
        "class_qualifier",
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "8",
      "hazard_class": "8",
      "placard_name": "CORROSIVE",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.558",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "8",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/8/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "8 | CORROSIVE | 172.558",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "9",
      "hazard_class": "9",
      "placard_name": "CLASS 9",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.560",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "9",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/9/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "9 | CLASS 9 (see <https://www.ecfr.gov/current/title-49/section-172.504#p-172.504(f)(9)> \u00a7 172.504(f)(9) ) | 172.560",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    },
    {
      "category": "Combustible liquid",
      "hazard_class": "Combustible liquid",
      "placard_name": "COMBUSTIBLE",
      "placarding_threshold": "1,001 lb (454 kg) aggregate gross weight",
      "placard_design_section": "172.544",
      "regulation": "\u00a7 172.504 General placarding requirements.",
      "general_placarding_rule": "Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section",
      "threshold_exception_scope": "when hazardous materials covered by table 2 of this section are transported by highway or rail, placards are not required",
      "threshold_quantity_rule": "A transport vehicle or freight container which contains less than 454 kg (1001 pounds) aggregate gross weight of hazardous materials covered by table 2",
      "id": "combustible-liquid",
      "url": "https://referencesource.org/dot-hazmat-placarding-thresholds/combustible-liquid/",
      "source": "https://www.ecfr.gov/current/title-49/section-172.504",
      "source_quote": "Combustible liquid | COMBUSTIBLE | 172.544",
      "verified_fields": [
        "hazard_class",
        "placard_design_section",
        "placard_name"
      ],
      "derived_fields": [
        "category",
        "placarding_threshold"
      ]
    }
  ]
}