Numéro CAS

CAS 121-57-3 — Acide sulfanilique

Sulfanilic acid is an aromatic sulfonic acid derivative used primarily as an intermediate in dye manufacturing, pharmaceuticals, and analytical chemistry. It serves as a key reagent in the synthesis of azo dyes, sulfa drugs, and various organic compounds. This white to off-white crystalline powder has a CAS number of 121-57-3, a molecular formula of 4-(H2N)C6H4SO3H, and a molecular weight of 173.19 g/mol. It is stable under ambient storage conditions but requires careful handling due to its warning-level hazards. Molekula supplies Sulfanilic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.