Workplace Hazardous Materials Information System (WHMIS)

WHMIS (Workplace Hazardous Materials Information System) is Canada's national hazard communication standard. The key elements of WHMIS are:

  • cautionary labelling of containers of WHMIS "controlled products"
  • provision of material safety data sheets (MSDSs)
  • worker education and training programs
    • .

WHMIS provides information on the safe use, storage, handling and disposal of hazardous materials at Canadian workplaces.

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WHMIS Hazard Symbols

There are 8 WHMIS hazard materials symbols representing the 8 classes of hazardous materials. The 8 classes are:

CLASS A Compressed Gas WHMIS symbol
CLASS A Compressed Gas

CLASS B Flammable and Combustible Material WHMIS symbol
CLASS B Flammable and Combustible Material

CLASS C Oxidizing Materials WHMIS symbol
CLASS C Oxidizing Materials

CLASS D-1 Poisonous and Infectious Material WHMIS symbol
CLASS D-1 Poisonous and Infectious Material (material causing immediate and serious effects)

CLASS D-2 Poisonous and Infectious Material WHMIS symbol
CLASS D-2 Poisonous and Infectious Material (material causing other toxic effects)

CLASS D-3 Poisonous and Infectious Material WHMIS symbols
CLASS D-3 Poisonous and Infectious Material (Biohazardous Infectious Material)

CLASS E Corrosive Material WHMIS symbol
CLASS E Corrosive Material

CLASS F Dangerously Reactive Material WHMIS symbol
CLASS F Dangerously Reactive Material

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