Railroad - Class 2

Gases - Extremely Poisonous

§174.290 applies to materials extremely poisonous by inhalation that are shipped by, for, or to the Department of Defense (DOD). These materials include Division 2.3 materials in Hazard Zone A and Division 6.1 materials in Hazard Zone A, as defined in §173.33(a)(2).

When transported by rail by the DOD, these extremely poisonous by inhalation materials may be transported in:

• UN 1N1 or UN 1N2 metal drums or equivalent military specification metal drums, by boxcar, gondola car (flat bottom), or stock car in carload lots
• Tanks that are authorized for a Hazard Zone A material extremely poisonous by inhalation, Specification DOT 106A, mounted on or secured to a multi-unit car, or gondola car (flat bottom) in carload lots only
• Bombs, by boxcar, or gondola car (flat bottom) in carload lots only
• Projectiles or ammunition for cannon with gas filled projectiles, by boxcar in carload or less-than-carload lots

Bombs, projectiles, and cannon ammunition transported by rail must be loaded, blocked, and braced, meeting specifications set by the DOD or the Bureau of Explosives Pamphlet No. 6A.

To learn more about Railroad HAZMAT visit our DOT Railroad HAZMAT Online Training web page.