CAS Registry Number

CAS 98-09-9 — Benzenesulfonyl chloride

Benzenesulfonyl chloride is an aromatic sulfonyl chloride used primarily as an intermediate in organic synthesis, pharmaceuticals, and agrochemical production, enabling sulfonamide formation and functional group transformations. It appears as a pale yellow to colorless liquid with a pungent odor, highly reactive in chlorosulfonation reactions. Catalogue details: CAS 98-09-9, molecular formula C6H5SO2Cl, molecular weight 176.62 g/mol, stored at ambient conditions under inert gas. Molekula supplies Benzenesulfonyl chloride from research to bulk quantities with full documentation and ISO 9001:2015 traceability.