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Environmental and Workplace Health

Do You Know These Vital Signs?

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The Hazard Symbols of WHMIS

CLASS A Compressed Gas


CLASS B Flammable and Combustible Materia


CLASS C Oxidizing Materials


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


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


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


CLASS E Corrosive Material


CLASS F Dangerously Reactive Material


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

For more information, consult the MSDS, and visit the Health Canada WHMIS Web site: