Synonyms: Chromate(3-),bis[4-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-3-hydroxy-1-naphthalenesulfonato(3-)]-,trisodium; Chromate(3-), bis[4-[[4,5-dihydro-3-methyl-5-(oxo-kO)-1-phenyl-1H-pyrazol-4-yl]azo-kN1]-3-(hydroxy-kO)-1-naphthalenesulfonato(3-)]-,trisodium (9CI); 1-Naphthalenesulfonic acid,4-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-3-hydroxy-,chromium complex