CAS Registry Number

CAS 14665-31-7 — 4-Chloro-5-chlorosulfonylsalicylic acid

4-Chloro-5-chlorosulfonylsalicylic acid is a chlorinated aromatic sulfonic acid used in organic synthesis, particularly in the production of dyes, pharmaceuticals, and specialty chemicals. It is a crystalline solid with the molecular formula C7H4Cl2O5S and a molecular weight of 271.07 g/mol. It is classified as dangerous and must be stored at 2 to 8 °C. Molekula supplies 4-Chloro-5-chlorosulfonylsalicylic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.