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Introduction to WHMIS

This section provides trainers with the history of WHMIS and an understanding of how and why the
system was developed.

WHAT IS WHMIS?

“WHMIS” stands for Workplace Hazardous Materials Information System. As the name suggests, it is a
system to provide information about hazardous materials (called “controlled products”) used in the
workplace.

WHMIS is a Canada-wide system. Any company in Canada that sells controlled products to a worksite
must provide information about the hazards and proper handling of those products. Employers must
ensure workers receive this information and know how to safely handle the products. The goal of
WHMIS is to reduce the potential for workplace injuries and illnesses from improper handling of
controlled products.

WHMIS is the result of ten years of consultation among federal and provincial governments, industry,
and organized labour. Its rules apply in every Canadian province and territory, as well as worksites
covered by federal law.

WHMIS is a three-part system:

1. Labels on containers of controlled products provide basic hazard information and precautions.

2. Material Safety Data Sheets (MSDS) provide further detailed information.

3. Worker education on applying this information.

WHMIS is just one part of a municipality’s overall Health and Safety Management System and should
be integrated into that bigger system.

WHY WHMIS?

Exposure to controlled products can cause or contribute to a variety of adverse health effects, including:

 Irritation of the skin (dermatitis)
 Chemical burns
 Sensitization
 Heart, liver, kidney or pulmonary ailments
 Cancer
 Reproductive effects
 Nervous system effects

Some materials may also be safety hazards because they can contribute to fires, explosions or other
incidents if improperly stored or handled.

AMHSA 3