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WHMIS is the "Workplace Hazardous Material Information System"

Class C: Oxidizing Material

This class includes materials which provide oxygen or similar substances and which increase the risk of fire if they come into contact with flammable or combustible materials.

Class C materials:

  • pose a fire and/or explosion risk in the presence of flammable or combustible material;
  • may cause fire when they come in contact with combusitble materials such as wood;
  • may react violently or cause an explosion when they come in contact with combustible materials such as fuels;
  • may burn skin and eyes upon contact.

    When handling Class C materials you should:

  • wear the proper protective equipment, including eye, face, and hand protection and protective clothing;
  • keep the material away from combustible materials;
  • keep the material away from sources of ignition;
  • never smoke when working with or near the material;
  • store the containers in designated areas.

    Examples: sodium hypochlorite, perchloric acid, inorganic peroxides.

  • Complete list of WHMIS Symbols:
    Class A Class B Class C Class D, Division 1 Class D, Division 2 Class D, Division 3 Class E Class F
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