73297-01-5 Chromate(2-), (2-amino-4-(amino-kappaN)-5-((2-(hydroxy-kappaO)-5-nitrophenyl)azo-kappaN1)benzenesulfonato(3-))(2,4-dihydro-4-((2-(hydroxy-kappaO)-5-nitrophenyl)azo-kappaN1)-5-methyl-2-phenyl-3H-pyrazol-3-onato(2-)-kappaO3)-, dihydrogen