Description General description Chlorosulfonic acid is a strong acid that is synthesized on an industrial scale by reacting sulfur trioxide and dry hydrogen chloride gas in an equimolar ratio. It can act as a sulfonating,[5] dehydrating, oxidizing and chlorinating agent. It is reported to be a better electrophilic olefin cyclization agent in comparison to other sulfonic acids.[2] Its infrared spectra in the solid, liquid and gaseous state have been recorded in the region 4000-400cm-1.[3] Application Chlorosulfonic acid may be used in the following processes: • Synthesis of di-n-butyl ammonium chlorosulfonate, a secondary amine ionic liquid.[4] • To prepare sulfonated polyethersulfone (SPES) with enhanced hydrophilic property.[5] • To attach sulfate group to silk fibroin for improving its anticoagulant ability.[1] • As a catalyst to prepare substituted coumarin, via von Pechmann condensation between phenol and β-ketoester.[6] • As a substitute to acid catalyst in Biginelli reaction to prepare 3,4dihydropyrimidines.[7] Packaging 1 kg in glass bottle 5, 100, 4×100 g in glass bottle View returnable container options.