class-2-3-poison-inhalation-hazard

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.