3 Hazardous Materials | Postal Explorer

3 Hazardous Materials

31 Definition

Hazardous material is a designation of items that fall within one of three categories: mailable, mailable with restrictions, or prohibited.

Hazardous materials are articles or substances designated by the United States (U.S.) Department of Transportation (DOT) as being capable of posing unreasonable risks to health, safety, or property during transportation. In international commerce, hazardous materials are referred to as “dangerous goods.”

For definitions of other terms that relate to hazardous materials, refer to Appendix D.