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Environmental and Workplace Health
Workplace Hazardous Materials Information System
Classes of WHMIS Controlled Products
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(PDF Version - 33 K)CLASS A - Compressed Gas
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 C - Oxidizing Material
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
- Division 3: Biohazardous Infectious Material
CLASS E - Corrosive Material
CLASS F - Dangerously Reactive Material
