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Environmental and Workplace Health

WHMIS Transition

The Hazardous Products Act (HPA) has been amended, and the WHMIS requirements for hazard classification and communication set out in the Controlled Product Regulations (CPR) and the Ingredient Disclosure List repealed and replaced with new regulations, the Hazardous Products Regulations (HPR). This modified WHMIS is referred to as WHMIS 2015. The HPA and HPR regulate suppliers of hazardous products (defined as persons who, in the course of business, sell or import a hazardous product) while federal, provincial and territorial (FPT) occupational health and safety (OHS) authorities regulate the employer requirements of WHMIS in workplaces.

To fully implement WHMIS 2015, changes to the FPT OSH requirements for hazard communication (labels and safety data sheets (SDSs)) are required. The interlocking nature of the FPT WHMIS requirements requires that the timing of implementation and the transition approach be coordinated across Canada. As each jurisdiction follows an independent legislative process, there may be a lag between the coming-into-force of the HPA and HPR and the timing of amendments to PT legislation.

To address this issue, PT OSH authorities have agreed to support a synchronized coming-into-force and transition across Canada until necessary changes are made to their legislation. Once finalized, each jurisdiction will communicate to its stakeholders what measures will be acceptable to ensure worker health and safety in workplaces.

To give suppliers, employers and workers time to adjust to the new system, implementation of the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) (WHMIS 2015) will take place over a three-stage transition period that is synchronized nationally across federal, provincial and territorial jurisdictions.

The purpose of the transition period is to enable:

  • time for partners and stakeholders to make the necessary legislative, regulatory and system adjustments;
  • old labels and material safety data sheets (MSDS) to be moved out of the supply chain and workplaces in a predictable manner;
  • increased employer and worker awareness and understanding of changes to hazard classification and communication in WHMIS 2015; and,
  • consistency across Canada through coordination and alignment between federal, provincial and territorial jurisdictions.

During the initial phase, suppliers must comply with the requirements of either WHMIS 1988 (repealed CPR/old HPA) or WHMIS 2015 (HPR/new HPA). The classification, label and (M)SDS must comply fully with the specific law and regulation chosen, and not a combination of the two WHMIS systems. See chart below.

This approach is similar to the approach adopted by the United States (U.S.) Occupational Safety and Health Administration to implement the Hazard Communication Standard (2012), which implemented the GHS in the U.S.

An (M)SDS and label that is compliant with the U.S. Hazard Communication Standard (2012) may not be sufficient for compliance in Canada. Suppliers and employers must be compliant with the Canadian requirements.

Transition Phases
Phases Timing Suppliers EmployersFootnote 1
Manufacturers and Importers Distributors


Footnote 1

Consult appropriate FPT OHS regulator to confirm requirements and transition timing.

Return tofootnote 1 referrer

Phase 1 From coming-into-force to May 31, 2017 Comply with CPR or HPR requirements Comply with CPR or HPR requirements Consult FPT OSH regulator
Phase 2 From June 1, 2017 to May 31, 2018 Comply with HPR requirements Comply with CPR or HPR requirements Comply with CPR or HPR requirements
Phase 3 From June 1, 2018 to November 30, 2018 Comply with HPR requirements Comply with HPR requirements Comply with CPR or HPR requirements
Completion December 1, 2018 Comply with HPR requirements Comply with HPR requirements Comply with HPR requirements

During transition a hazardous product that is found to be non-compliant with the CPR must be voluntarily brought into compliance with the CPR, or the supplier will be required to comply with the HPR, no matter which transitional phase applies at the time.

With respect to exemptions from disclosure of confidential business information (CBI), a transitional schedule will apply to hazardous products for which a claim for exemption has or will be filed with Health Canada under the Hazardous Materials Information Review Act.