The Canadian Centre for Occupational Health and Safety (CCOHS) has a vision: the elimination of work-related illnesses and injuries. We serve Canadians – and the world – with credible and relevant tools and resources to improve workplace health and safety programs. We encourage you to join us in creating a work world without pain, loss or tragedy. We believe that all Canadians have a fundamental right to a healthy and safe working environment. Through our programs, services, knowledge, commitment, and action, CCOHS will continue its efforts to advance health and safety in the workplace.

Canadian Centre for Occupational Health and Safety (CCOHS)


Quickly find information on over 200,000 chemical names and specific CAS registry numbers in the CCOHS database collection.

WHMIS classification

WHMIS classification and symbols for over 700 pure chemicals, extracted from CCOHS’ comprehensive and authoritative CHEMINFO database.