73559-51-0 Chromate(2-), (3-(hydroxy-kappaO)-4-((2-(hydroxy-kappaO)-1-naphthalenyl)azo-kappaN1)-7-nitro-1-naphthalenesulfonato(3-))(N-(7-(hydroxy-kappaO)-8-((2-(hydroxy-kappaO)-4-nitrophenyl)azo-kappaN1)-2-naphthalenyl)acetamidato(2-))-, disodium