Canadian Centre for Occupational Health and Safety
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Health and Safety: Teaching Tools
Get To Know These Symbols

WHMIS Hazard Symbols

Hazard Description WHMIS Symbol
POISONOUS
INFECTIOUS

Causes immediate poisoning or long-term harmful health effects, disease or sensitization, or irritates skin/eyes.

Poisonous/Infectious WHMIS Symbol Materials Causing Other Toxic Effects Biohazardous Infectious Material
FLAMMABLE & COMBUSTIBLE
Catches fire very easily.

Flammable & Combustible WHMIS Symbol
OXIDIZING
Causes or speeds up a fire.

Oxidizing WHMIS Symbol
CORROSIVE
Burns skin and eyes.
Burns throat if breathed in.

Corrosive WHMIS Symbol
DANGEROUSLY REACTIVE
Explodes or gives off toxic vapours.

Dangerously Reactive WHMIS Symbol
COMPRESSED GAS
Can explode or "rocket" if dropped, damaged, heated or crushed. Can cause suffocation or frostbite.

Compressed Gas WHMIS Symbol