Synonyms: disodium [3-[4,5-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonato(3-)][1-[[2-hydroxy-5-(phenylazo)phenyl]azo]-2-naphtholato(2-)]chromate(2-);Chromate(2-), 3-4,5-dihydro-4-2-(hydroxy-.kappa.O)-5-nitrophenylazo-.kappa.N1-3-methyl-5-(oxo-.kappa.O)-1H-pyrazol-1-ylbenzenesulfonato(3-)1-2-(hydroxy-.kappa.O)-5-(phenylazo)phenylazo-.kappa.N1-2-naphthalenolato(2-)-.kappa.O-, disodium;Dinatrium-[3-[4,5-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzolsulfonato(3-)][1-[[2-hydroxy-5-(phenylazo)phenyl]azo]-2-naphtholato(2-)]chromat(2-);chromate(2-), [3-[4,5-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-3-methyl-5-oxo-1;Chromate(2-), [3-[4,5-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulfonato (3-)][1-[[2-hydroxy-5-(phenylazo)phenyl]azo]-2-naphthalenolato(2-)]-, disodium;Chromate(2-),[3-[4,5-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl] benzenesulfonato(3-)][1-[[2-hydroxy-5-(phenylazo)phenyl]azo]-2-naphthalenolato(2-)]-,disodium;h-pyrazol-1-yl]benzenesulfonato(3-)][1-[[2-hydroxy-5-(phenylazo)phenyl]azo]-2-n