3-Chloropropanesulfonyl Chloride CAS 1633-82-5 Sulfonation Reagent Organic Intermediate for Pharmaceutical Synthesis Overview 3-Chloropropanesulfonyl chloride (CAS 1633-82-5) belongs to the class of aliphatic sulfonyl chloride compounds. This chemical acts as a versatile sulfonylating agent for introducing sulfonyl functional groups into organic molecules. It delivers high reactivity and good selectivity in nucleophilic substitution reactions, supporting route development in