Synonyms: Benzenesulfonicacid, 2,4-diamino-, monosodium salt (8CI,9CI);Benzenesulfonic acid,2,4-diamino-, sodium salt (7CI);1,3-Phenylenediamine-4-sulfonic acid sodiumsalt;2,4-Diaminobenzenesulfonic acid monosodium salt;Sodium1,3-phenylenediamine-4-sulfonate;Sodium 2,4-diaminobenzenesulfonate;Sodiumm-phenylenediamine-4-sulfonate;