The Workplace Hazardous Materials Information System (WHMIS) is Canada's hazard communication standard. The key elements of the system are:

  • hazard classification
  • cautionary labelling of containers
  • the provision of safety data sheets (SDSs)
  • worker education programs

Suppliers, employers, and workers each have requirements under WHMIS.

WHMIS is based on the Globally Harmonized System of Classification and Labelling of Chemicals (GHS). As GHS is periodically updated, WHMIS may also be amended to strengthen worker health and safety in Canada and facilitate international trade. Stay current about WHMIS requirements in each jurisdiction, and access useful resources, by checking the portal regularly. is provided through the collaboration of Health Canada, the regulatory jurisdictions across Canada, and the Canadian Centre for Occupational Health and Safety (CCOHS).


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