Category
Chemical Primary Standard
CAS Number
7790-94-5
Molecular Formula
ClHO3S
Molecular Weight
116.52 g/mol
Synonym

chlorosulfuric acid, sulfurochloridic acid, monochlorosulfonic acid.

Keywords
Miscellaneous Reagents
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Chlorosulfonic acid (ClSO₃H) is a strong, corrosive reagent used for sulfonation and chlorination in the production of dyes, drugs, and detergents. It reacts violently with water and must be handled with extreme care.