| name | class-2-3-poison-inhalation-hazard |
| description | Use when handling Class 2.3 toxic gas (TIH/PIH). Highest-restriction gases, route + driver requirements, security plans.
|
Class 2 3 Poison Inhalation Hazard
Gases toxic by inhalation: chlorine, anhydrous ammonia, hydrogen sulfide, sulfur dioxide.
Carrier requirements
- TSA Threat Assessment + H endorsement
- Specialized training beyond HM-126
- Security plan (49 CFR 172.800)
- Tracked routing
- Driver communication every 4 hours
Tanks
- MC-330/MC-331 for liquefied gas
- Excess flow valves, emergency shutoff
- Annual hydrostatic testing
Common violations
Lapsed tank inspection. Driver without specialized training.
Where this fits in X3 Compass
Applied in the X3 Compass Hazmat Center add-on.