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Workplace Hazardous Materials Information System
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Classes of WHMIS Controlled Products
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(PDF Version - 33 K)
CLASS B - Flammable and Combustible Material
Division 1: Flammable Gases
Division 2: Flammable Liquids
Division 3: Combustible Liquids
Division 4: Flammable Solids
Division 5: Flammable Aerosols
Division 6: Reactive Flammable Materials
CLASS D - Poisonous and Infectious Material
Division 1: Materials Causing Immediate and Serious Toxic Effects
Subdivision A: Very Toxic Material
Subdivision B: Toxic Material
Division 2: Materials Causing Other Toxic Effects
Subdivision A: Very Toxic Material
Subdivision B: Toxic Material
