Bisulfide

Bisulfide (or bisulphide in British English) is an inorganicanion with the chemical formula HS (also written as SH). It contributes no color to bisulfide salts. It often coexists with hydrogen sulfide, which has a distinctive putrid smell. It is a strong base.

It is an important chemical reagent and an industrial chemical, mainly used in paper pulp industry (Kraft process).