CAS Registry Number

CAS 121-51-7 — 3-Nitrobenzenesulfonyl chloride

3-Nitrobenzenesulfonyl chloride is an aromatic sulfonyl chloride used primarily as a reagent in organic synthesis, particularly for the preparation of sulfonamides, sulfonyl fluorides, and other sulfonyl derivatives. It is also employed in pharmaceutical intermediate manufacturing and as a selective electrophile in peptide chemistry. This chemical has a CAS number of 121-51-7 and carries no EU hazard classification signal word. It is a solid at room temperature, typically supplied as a crystalline powder with a yellowish tint. Molekula supplies 3-Nitrobenzenesulfonyl chloride from research to bulk quantities with full documentation and ISO 9001:2015 traceability.