USPS Packaging Instruction 2A

Flammable Gases

A Class 2, Division 2.1 flammable gas that qualifies as a Limited Quantity surface material is mailable provided that all applicable requirements in 342 are met and it is properly packaged as follows.

Proper Shipping Name

ID Number


Required Packaging

Primary Receptacle
Cushioning Material
Outer Packaging

Labels and markings must be placed on the address side of the mailpiece unless specified differently in 221.1 and 325.1.