The Workplace Hazardous Materials Information System (WHMIS) is Canada's national communication standard for hazardous workplace materials. It provides essential information about the safe use, handling, and storage of hazardous substances through labels, safety data sheets, and worker education and training programs. WHMIS aims to protect workers by ensuring they understand the risks associated with hazardous materials. It categorizes materials into classes and provides symbols to easily identify hazards, promoting a safer work environment. Compliance with WHMIS is mandatory for employers and employees in workplaces where hazardous materials are present.