1. Hazard Classes

Hazard Classes according 49 CFR 173.2

Class 1
Explosives
HazMat Symbol
Class 2
Gases
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Class 3
Flammable liquids
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Class 4
Other Flammable Substances
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Class 5
Oxidizing Substances & Organic Peroxides
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Class 6
Poisonous / Toxic Substances
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Class 7
Radioactive materials
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Class 8
Corrosives
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Class 9
Miscellaneous hazardous materials
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