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Module 3: Classifications

• Introduction
• Module 1: WHMIS Basics
• Module 2: Key Elements of WHMIS
• Module 3: Classifications

• Module 4: Labelling
• Module 5: MSDS
• Module 6: Hazards
• Module 7: Responsibilities

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Six Classifications

When a material is listed as a controlled product, the manufacturer needs to treat the product according to WHMIS regulations. Part of this regulation is to classify it according to a hazard class. The WHMIS system groups hazardous materials into 6 distinct classifications.

 

These six categories are:

Class	Symbol
Class A - Compressed Gas
Class B - Flammable and Combustible Material
Class C - Oxidizing Material
Class D - Poisonous and Infectious Material – Division 1 – materials causing immediate and serious toxic effects
Class D - Poisonous and Infectious Material – Division 2 – materials causing other serious toxic effects
Class D - Poisonous and Infectious Material – Division 3 – biohazardous infections materials
Class E - Corrosive Materials
Class F - Dangerously Reactive Materials

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