Synonyms: Chromate(3-),[3-(hydroxy-kO)-4-[[2-(hydroxy-kO)-1-naphthalenyl]azo-kN1]-1-naphthalenesulfonato(3-)][6-(hydroxy-kO)-5-[[2-(hydroxy-kO)-1-naphthalenyl]azo-kN1]-1-naphthalenesulfonato(3-)]-,trisodium (9CI); Chromate(3-),[3-hydroxy-4-[(2-hydroxy-1-naphthalenyl)azo]-1-naphthalenesulfonato(3-)][6-hydroxy-5-[(2-hydroxy-1-naphthalenyl)azo]-1-naphthalenesulfonato(3-)]-,trisodium; 1-Naphthalenesulfonic acid, 3-hydroxy-4-[(2-hydroxy-1-naphthalenyl)azo]-,chromium complex; 1-Naphthalenesulfonic acid,6-hydroxy-5-[(2-hydroxy-1-naphthalenyl)azo]-, chromium complex