CAS Registry Number

CAS 7143-01-3 — Methanesulfonic anhydride

Methanesulfonic anhydride is a strong sulfonylating agent widely used in organic synthesis, particularly for the preparation of sulfonamides, sulfonates, and other sulfur-containing compounds. It is also employed in peptide synthesis and as a reagent in medicinal chemistry. This chemical has a CAS number of 7143-01-3, a molecular formula of (CH3SO2)2O, and a molecular weight of 174.20 g/mol. It requires storage between 2 to 8°C and carries a **Danger** signal word due to its corrosive and hazardous properties. Molekula supplies Methanesulfonic anhydride from research to bulk quantities with full documentation and ISO 9001:2015 traceability.