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WHMIS is the "Workplace Hazardous Material Information System"

Class B: Flammable and Combustible Material

This class includes solids, liquids and gases capable of catching fire or exploding in the presence of a source of ignition.

Class B materials:

  • will burn and are therefore potential fire hazards.
  • may burn at relatively low tempertaues; flammable materials catch fire at lower temperatures than combustible materials.
  • may burst into flame spontaneouly in air or may release a flammable gas on contact with water;
  • may cause a fire when exposed to heat, sparks, or flames or as a result of friction;

    When handling Class B materials you should:

  • keep the material away from heat sources and other combustible materials;
  • never smoke when working with or near the material;
  • store the containers in designated areas.

    Examples: white phosphorus, acetone and butane. Flammable liquids such as acetone are more easily ignited than combustible liquids such as kerosene.

  • 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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