Workplace Hazardous Materials Information System (WHMIS)

The Workplace Hazardous Materials Information System (WHMIS) is Canada's national hazard communication standard. The key elements of the system are hazard classification, cautionary labelling of containers, the provision of safety data sheets (SDSs) and worker education and training programs.

Learn about WHMIS and how it is implemented in Canada, including its administration and legal foundation (Hazardous Product Act (HPA) and associated regulations).  This topic also provides information on excluded sectors.

Learn about how a WHMIS supplier can protect and maintain the confidentiality of certain chemicals used in WHMIS hazardous products through the claim for exemption process.

Hazardous substance assessments

Hazardous substance assessments are technical documents that describe the classification of chemicals in the different hazard classes outlined in the Hazardous Products Act and regulations. These documents have been produced by Health Canada as educational and information resources and can support suppliers in developing a safety data sheet.

See details to contact Health Canada about WHMIS or to contact the federal, provincial and territorial occupational health and safety regulators.

Lifting the interim policy for cleaning products for use, handling or storage in workplaces (COVID-19)

Health Canada created an interim policy to help make available certain workplace hazardous cleaning products that did not fully meet certain labelling and information regulatory requirements during the COVID-19 pandemic. The interim policy was lifted on April 29, 2022.

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