Definition: The U.S. Department of Transportation (DOT) and the International Air Transportation Association (IATA) define hazardous materials as articles or substances which are capable of posing a risk to health, safety, property, or the environment; are listed or classified in the regulations, and are transported in commerce.
There are nine classes of hazardous materials:
Class of Hazard |
Description |
Hazard Class 1: Explosives |
1.1 mass explosion hazard |
Hazard Class 2: Compressed Gases |
2.1 flammable gases |
Hazard Class 3: Flammable Liquids |
Flammable (flash point below 141°) |
Hazard Class 4: Flammable Solids |
4.1 flammable solids |
Hazard Class 5: Oxidizers and Organic Peroxides |
5.1 Oxidizer |
Hazard Class 6: Toxic Materials |
6.1 Material that is poisonous |
Hazard Class 7: Radioactive Material |
Radioactive I |
Hazard Class 8: Corrosive Material |
Destruction of the human skin |
Hazard Class 9: Miscellaneous |
A material that presents a hazard during shipment but does not meet the definition of the other classes |
If you need assistance, EH&S will research your item and advise you. Contact EHS, (831) 459-2553.
Radioactive materials: If you plan to ship radioactive materials,
follow the instructions on How to Transfer Radioactive Materials.
To read the regulations concerning the transport of hazardous
material, see:
§ U.S. Department of Transportation, Office of Hazardous Materials Safety, 49 CFR Regulations 171.8, 172.101, 173
§ International Air Transportation Association (IATA), Dangerous Goods Information Online