Postal Explorer > Publication 52 - Hazardous, Restricted, and Perishable Mail > Appendix C USPS Packaging Instructions for Mailable Hazardous Materials > USPS Packaging Instruction 9C

USPS Packaging Instruction 9C

Miscellaneous Hazardous Materials

A Class 9 miscellaneous hazardous material that qualifies as an ORM-D material is permitted in domestic mail provided all applicable requirements in 349 are met.

Proper Shipping Name

• Consumer Commodity.

ID Number

• Various (see Appendix A).

Mailability

• International Mail: Prohibited.

• Domestic Mail: Permitted via air transportation (Express Mail, Priority Mail, and First-Class Mail) or surface transportation as Standard Mail or Parcel Post. Flammable materials are prohibited from air transportation.

Required Packaging

Primary receptacle

• For liquids, the capacity of the primary receptacle must not exceed 1 pint.

• For solids, the weight of the primary receptacle and its contents must not exceed 1 pound.

• Multiple primary receptacles are permitted.

Cushioning Material

• Enough cushioning material must surround the primary receptacle to prevent breakage and absorb all potential leakage.

Outer Packaging

• A strong outer packaging that is capable of firmly and securely holding the primary receptacle and cushioning material is required.

• Each mailpiece must not exceed a total weight of 25 pounds.

Marking

• For air transportation, each mailpiece must be clearly marked on the address side with "Consumer Commodity ORM-D AIR."

• For surface transportation, each mailpiece must be clearly marked on the address side with "Consumer Commodity ORM-D" and "Surface Mail Only" or "Surface Only."

• A complete return address and delivery address must be used.

Documentation

• For air transportation, a mailable material must have a properly completed shipper's declaration for dangerous goods prepared in triplicate and affixed to the outside of the mailpiece.