CAS 3588-76-9 appears in our catalog under these names: 4-Amino-3-hydroxybenzenesulfonamide, 97%, 4-Amino-3-hydroxybenzenesulfonamide (may contain up to 20% inorganics), >95% (HPLC), 4-amino-3-hydroxybenzenesulfonamide, >95% (HPLC), 4-Amino-3-hydroxybenzenesulfonamide, 95+%, 4-Amino-3-Hydroxybenzenesulfonamide. Offered by: Combi-blocks, TRC, AmBeed, Chemat, Fluorochem. Available pack sizes: 250mg, 5g, 1g, 100mg, 10mg, 50mg.