73018-78-7 Chromate(3-), (5-amino-4-hydroxy-3-((2-hydroxy-5-nitrophenyl)azo)-2,7-naphthalenedisulfonato(4-))(2-((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo)benzoato(2-))-, trihydrogen