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Chlorosulfuric acid (IUPAC name: sulfurochloridic acid) is the inorganic compound with the formula HSO3Cl. It is also known as chlorosulfonic acid, being the sulfonic acid of chlorine.
C 2167 (OTTO) Chlorosulfonic acid, GR 99%+ - used as an anti-contrail agent in Ryan Model 147 reconnaissance drones, and to produce smoke screens.