US DOT HazMat Placards

These pages provide US DOT (U.S. Department of Transportation) definitions for each hazmat placard used in transportation. Title 49 of the United States Code of Federal Regulations (49CFR) also known as the Federal Motor Carriers Safty Regulations (FMCSR) requires the use hazardous materials placards when shipping hazardous materials cargo and dangerous goods in the United States. Canada, Mexico and many other countries have simular regulations that also require the use of these placards.

Four Digit UN Numbers on Placards

Have you ever wondered what those four digit numbers on the placards on the side of trucks and rail cars mean? UN/NA numbers (the four digit number) found on bulk placards refer to specific chemicals or groups of chemicals and are assigned by the United Nations and/or the United States Department of Transportation. Our online USDOT 2004 Emergency Response Guidebook will help you find out what the four digit numbers you see on placards mean.

Clipart CD of Placards Available

CDs containing high-resolution "clipart" versions of each hazmat placard can be purchased from us for $50 U.S. including shipping (via U.S. Mail). This CD now contains the USDOT's hazardous materials transportation training modules as a free bonus. For more information and/or to order the CD, please see our placarding CD ordering page.

Class 1 Explosives - 49CFR 173.50

Image map of class 1 placards
1.1 Explosives1.2 Explosives1.3 Explosives1.4 Explosives1.5 Blasting Agents1.6 Explosives

Class 2 Compressed Gasses - 49CFR 173.115

Image map of class 2 placards
2.1 Flammable Gas2.2 Non-Flammable Gas2.2 Oxygen2.3 Poison Gas

Class 3 Flammable Liquids - 49CFR 173.120

Image map of class 3 placards
3 Flammable Liquid3 Cumbustable Liquid3 Gasoline3 Fuel Oil

Class 4 Flammable Solids - 49CFR 173.124

Image map of class 4 placards
4.1 Flammable Solid4.2 Spontaneously Combustible4.3 Dangerous When Wet

Class 5 Oxidizers - 49CFR 173.127

Image map of class 5 placards
5.1 Oxidizer5.2 Organic Peroxide

Class 6 Poisons - 49CFR 173.132

Image map of class 6 placards
6.1 Inhalation Hazard6.1 Poison6.1 Toxic6.1 Packing Group III

Class 7 Radioactive Materials- 49CFR Subpart I

Class 8 Corrosive Liquids - 49CFR 173.136

Class 9 Miscellaneous - 49CFR 173.140

Image map of class 9 placards
9 U.S. Miscellaneous9 Canadian Miscellaneous

Other Related Markings

Image map of class 9 placards
Dangerous Marine pollutant

USDOT 2004 Emergency Response Guidebook

Have you ever wondered what those four digit numbers on the placards on the side of trucks and rail cars mean? UN/NA numbers (the four digit number) found on bulk placards refer to specific chemicals or groups of chemicals and are assigned by the United Nations and/or the United States Department of Transportation. Our online USDOT 2004 Emergency Response Guidebook will help you find out what the four digit numbers you see on placards mean.

References

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