Abstract
AbstractChlorosulfuric acid, more widely known as chlorosulfonic acid, is a strong mineral acid made by reacting equimolar quantities of hydrogen chloride and sulfur trioxide. Its structure is analogous to sulfuric acid: the chloride replaces a hydroxyl group. Chlorosulfuric acid is a highly reactive chemical used principally in organic synthesis as a sulfating, sulfonating, or chlorosulfonating agent. Its main applications are an intermediate in the production of synthetic detergents, surfactants, and pharmaceuticals. It is also used in the production of dyes and pigments, ion‐exchange resins, pesticides, and plasticizers.Commercial‐grade chlorosulfuric acid has a purity of 99+%. When exposed to the atmosphere, it reacts with the moisture present to form dense white clouds of sulfuric acid and hydrochloric acid mists. It has been used as a smoke screen in wartime.
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