Synonyms: Chromate(4-),[2-[[4-[[2,4-dihydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl]azo]phenyl]amino]-5-nitrobenzenesulfonato(3-)][2-[[2,6-dihydroxy-3-[(2-hydroxy-3,5-dinitrophenyl)azo]-5-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]phenyl]azo]-5-nitrobenzenesulfonato(4-)]-,trisodium hydrogen (9CI); Benzenesulfonic acid,2-[[2,6-dihydroxy-3-[(2-hydroxy-3,5-dinitrophenyl)azo]-5-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]phenyl]azo]-5-nitro-,chromium complex; Benzenesulfonic acid,2-[[4-[[2,4-dihydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]-3-[(4-nitrophenyl)azo]phenyl]azo]phenyl]amino]-5-nitro-,chromium complex