Poisonous gas Zone B — class 2.3 with class 8 liquids only — Carriage by Public Highway
For Poisonous gas Zone B, transport mode is Carriage by Public Highway; segregation code is O; what the code requires is The letter “O” in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur, verified against its source on 2026-11-09.
- First hazard class (table row)
- 2.3 verified
- Second hazard class (table column)
- 8 liquids only verified
- Row description
- Poisonous gas Zone B verified
- Transport mode
- Carriage by Public Highway
- Segregation code
- O verified
- What the code requires
- The letter “O” in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. verified
What the source says
Segregation code
The source prints this value inside the passage below but does not name it there. The passage shows where it appears; what ties it to this record is the position on the page, not anything the passage says.
Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O
— ecfr.gov, retrieved 2026-09-25
Where each value comes from
This source states these in separate places, so each value is shown with the passage it comes from.
Second hazard class (table column)
The source prints this value inside the passage below but does not name it there. The passage shows where it appears; what ties it to this record is the position on the page, not anything the passage says.
Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only
What the code requires
The letter “O” in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.
— all from ecfr.gov, retrieved 2026-09-25
Source
- ecfr.govhttps://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848