chlorosulfonic acid

[ klawr-oh-suhl-fon-ik, klohr-, klawr-, klohr- ]

noun

1. a colorless or yellowish, highly corrosive, pungent liquid, HClO 3 S, usually produced by treating sulfur trioxide with hydrogen chloride: used in organic synthesis to introduce the sulfonyl chloride group, =SO 2 Cl.

Word History and Origins

Origin of chlorosulfonic acid¹

chloro- ² + sulfonic acid