CFR: The Code of Federal Regulations – a collection of regulations under United States law.


Division: A subdivision of a hazard class.


Excepted: Not included, excluded, omitted, left out.

hazard classifications

Hazard Classification: The category of hazard assigned to a hazardous material under the definitional criteria of 49 CFR part 173 of the HMR and the provisions of the Hazardous Materials Table. A material may meet the defining criteria for more than one hazard class but is assigned to only one hazard class.

hazardous substances

Hazardous Substance: A material listed in Appendix A to 49 CFR 172.101 of the HMR and is in a quantity, in one package, that meets or exceeds the reportable quantity (RQ).

hazardous waste

Hazardous Waste: Any material that is subject to the Hazardous Waste Manifest Requirements of the U.S. Environmental Protection Agency specified in 40 CFR part 262.


Hazmat: A substance or material that the Secretary of Transportation has determined is capable of posing an unreasonable risk to health, safety, and property when transported in commerce.

hazmat employee

Hazmat Employee: Anyone who is employed by a hazmat employer and directly affects the safety of hazardous materials during transport. This includes the owner-operator of a motor vehicle who transports hazardous materials in commerce. It also includes any individual employed by a hazmat employer or is self-employed, who, during the course of employment: (1) Loads, …

hazmat employee Read More »

hazmat table

Hazmat Table: Also known as the hazardous materials table, HMT, or the Table, Found in 49 CFR 172.101, the Table provides an alphabetical listing of over 3,000 shipping names/descriptions that can be used to describe hazardous materials. The Table lists information that is necessary to prepare and transport a hazardous material.

hazmat transportation

Hazmat Transportation: The process of loading, unloading, temporarily storing, and transporting hazardous materials.