Benzenesulfonyl chloride

Benzenesulfonyl chloride (CAS 98-09-9), also known as phenylsulfonyl chloride, is a reactive sulfonylating agent.

Where is Benzenesulfonyl chloride used?

• Pharmaceutical manufacturing: key building block for sulfonamide drugs, protecting groups and active pharmaceutical intermediates requiring controlled sulfonylation
• Dye and pigment production: manufacture of azo dyes for textile and leather finishing
• Water treatment: sulfonyl chloride-derived compounds as biocidal actives targeting microbial control
• Paper processing: sulfonyl-based surface treatment agents that improve wet strength and resistance properties
• It introduces sulfonyl groups into organic molecules, enabling construction of intermediates.

Good to know: Sensitive to hydrolysis during storage and transit; buyers should confirm moisture-controlled packaging requirements with suppliers.

Commercial specifications

• Technical grade and high-purity grades
• Purity typically confirmed by GC analysis
• Standard drum and IBC packaging