Workplace Hazardous Materials Information System
（重定向自WHMIS）
The Workplace Hazardous Materials Information System (WHMIS), (known as SIMDUT, Système d'information sur les matières dangereuses utilisées au travail in French) is Canada's national workplace hazard communication standard. The key elements of the system, which came into effect on October 31, 1988, are cautionary labelling of containers of WHMIS controlled products, the provision of material safety data sheets (MSDSs) and worker education and site-specific training programs.