OSHwiki — substitution of hazardous chemicals

Substitution means replacing hazardous chemicals with safer alternatives. It is at the top of the hierarchy of control measures applied to substances. There are tools available that are useful for substitution and shared knowledge can be helpful in the substitution process.
Substitution, in this OSHwiki article, refers to the replacement of hazardous chemicals with safer substances, but also with other types of measures: technological and organisational measures and product revision.