73287-41-9 73287-42-0 Chromate(2-), (2-((4,5-dihydro-3-methyl-5-(oxo-kappaO)-1-(4-sulfophenyl)-1H-pyrazol-4-yl)azo-kappaN1)benzoato(3-))(1-((2-(hydroxy-kappaO)-4-nitrophenyl)azo-kappaN1)-2-naphthalenolato(2-)-kappaO)-, dihydrogen