Ask X3
Ask X3 › Guides › HazMat: Classification & Shipping Papers

What does 49 CFR 173.21 (Forbidden materials and packages) require?

Generated guidance. Confirm the source and its applicability before you act. How we check sources.

Short answer

49 CFR 173.21 requires that certain materials and packages are forbidden from being offered for transportation or transported, including materials designated as Forbidden in Column 3 of the 172.101 table, forbidden explosives, and packages that give off a flammable gas or vapor.

The rule says

"Unless otherwise provided in this subchapter, the offering for transportation or transportation of the following is forbidden: (a) Materials that are designated Forbidden in Column 3 of the 172.101 table." (49 CFR 173.21)

"(b) Forbidden explosives as defined in 173.54 of this part." (49 CFR 173.21)

"(g) Packages which give off a flammable gas or vapor, released from a material not otherwise subject to this subchapter, likely to create a flammable mixture with air in a transport vehicle." (49 CFR 173.21)

In plain English

It prohibits the transportation of certain materials and packages that pose a significant risk to people, the environment, and property. For example, materials that are highly explosive or toxic are forbidden, as are packages that can release flammable gases or vapors. The regulation also requires that packages be designed and constructed to prevent accidents and minimize the risk of damage or injury.

What to do

§ 49 CFR 173.21 · eCFR ↗Sources retrieved: 8 retrieved CFR sections · 6 X3 obligations

Related questions

What does 49 CFR 173.417 (Authorized fissile materials packages) require? — Ask X3What does 49 CFR 173.54 (Forbidden explosives) require? — Ask X3What does 49 CFR 173.411 (Industrial packages) require? — Ask X3What does 49 CFR 173.7 (Government operations and materials) require? — Ask X3