Classifications of Hazardous Materials

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Classifications of Hazardous Materials

Hazardous materials are classified according to the risks that they pose. These nine hazardous materials classifications are consistent across all agencies that regulate commercial shipping.
  • Class 1: Explosives
  • Class 2: Gases
  • Class 3: Flammable liquids
  • Class 4: Flammable solids
  • Class 5: Oxidizers/organic peroxides
  • Class 6: Toxic and infectious substances
  • Class 7: Radioactive material
  • Class 8: Corrosives
  • Class 9: Miscellaneous hazardous materials (includes Dry Ice)

Top: A Division 6.2 label for infectious substances.
Bottom: A Class 9 label for dry ice.
A shipment with the Division 6.2 and Class 9 labels, highlighted in red.