chlorosulfonic acid: Meaning and Definition of

chlo'ro•sul•fon'ic ac'id

Pronunciation: (klôr'ō-sul-fon'ik, klōr'-, klôr"-, klōr"-), [key]

a colorless or yellowish, highly corrosive, pungent liquid, HClOS, usually produced by treating sulfur trioxide with hydrogen chloride: used in organic synthesis to introduce the sulfonyl chloride group, =SOCl.