chlorosulfuric acid

== English == === Alternative forms === chlorosulphuric acid === Etymology === From chloro- + sulfuric acid. === Noun === chlorosulfuric acid (uncountable) (inorganic chemistry) The strong acid ClSO2OH obtained from sulfuric acid by the replacement of a hydroxyl group with a chlorine atom; it is used in the preparation of sulfonic acids. ==== Synonyms ==== chlorosulfonic acid ==== Derived terms ==== chlorosulfate