Classification
WHMIS Classification
A controlled product is a product that falls into one or more of the hazard classes described below. Manufacturers and suppliers classify these products and assign one or more of the appropriate hazard symbols. There are eight WHMIS hazard symbols. Employers must train workers to recognize these symbols and to know what they mean. Right click on your mouse to copy the hazard symbols to your clip board.
WHMIS After GHS: An Introduction
Free e-Learning course developed by CCOHS.
Learn about possible changes to WHMIS requirements after the implementation of the Globally Harmonized System of Classification and Labeling of Chemicals (GHS).
Source: CCOHS (Canadian Centre for Occupational Health & Safety)
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CLASS A: COMPRESSED GAS
This class includes compressed gases, dissolved gases, and gases
liquefied by compression or refrigeration.
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CLASS B: FLAMMABLE AND COMBUSTIBLE MATERIAL
This class includes solids, liquids, and gases capable of catching
fire in the presence of a spark or open flame under normal working conditions.
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CLASS C: OXIDIZING MATERIAL
These materials increase the risk of fire if they come in contact
with flammable or combustible materials.
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CLASS D: POISONOUS AND INFECTIOUS MATERIAL
Division 1: Materials Causing Immediate and Serious Toxic Effects
These materials can cause death or immediate injury when a person is
exposed to small amounts. Examples: sodium cyanide, hydrogen sulphide
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CLASS D: POISONOUS AND INFECTIOUS MATERIAL
Division 2: Materials Causing Other Toxic EFFECTS
These materials can cause life-threatening and serious long-term
health problems as well as less severe but immediate reactions in a person who is
repeatedly exposed to small amounts.
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CLASS D: POISONOUS AND INFECTIOUS MATERIAL
Division 3: Biohazardous Infectious MATERIAL
These materials contain harmful micro-organisms that have been
classified into Risk Groups 2, 3, and 4 as determined by the World Health Organization
(WHO) or the Medical Research Council of Canada.
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CLASS E: CORROSIVE MATERIAL
This class includes caustic and acid materials that can destroy the
skin or eat through metals. Examples: sodium hydroxide, hydrochloric acid, nitric acid
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CLASS F: DANGEROUSLY REACTIVE MATERIAL
These products may self-react dangerously (for example, they may
explode) upon standing or when exposed to physical shock or to increased pressure or
temperature, or they emit toxic gases when exposed to water.
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