Synonyms: Chromate(3-),bis[3-[(2,4-dihydroxyphenyl)azo]-4-hydroxybenzenesulfonato(3-)]-, trihydrogen;Chromate(3-), bis[3-[[2-(hydroxy-kO)-4-hydroxyphenyl]azo-kN1]-4-(hydroxy-kO)benzenesulfonato(3-)]-, trihydrogen (9CI); Benzenesulfonic acid,3-[(2,4-dihydroxyphenyl)azo]-4-hydroxy-, chromium complex