Synonyms: 1-Phenol-4-sulfonicacid, 2-(2,4-dihydroxyphenylazo)- (6CI); Benzenesulfonic acid, 3-[(2,4-dihydroxyphenyl)azo]-4-hydroxy-(9CI); C.I. Mordant Red 5 (8CI); 2,2',4-Trihydroxyazobenzene-5'-sulfonic acid;3-(2,4-Dihydroxyphenylazo)-4-hydroxybenzenesulfonic acid; NSC 97024;Superchrome Garnet Y