Synonyms: Chromate(3-), bis(6-(hydroxy-kappaO)-5-(2-(2-(hydroxy-kappaO)-4-nitrophenyl)diazenyl-kappaN1)-2-naphthalenesulfonato(3-))-, hydrogen (1:3);Chromate(3-), bis(5-((2-hydroxy-4-nitrophenyl)azo)-6-hydroxy-2-naphthalenesulfonic acid)-, trihydrogen;Chromate(3-), bis(6-(hydroxy-kappaO)-5-((2-(hydroxy-kappaO)-4-nitrophenyl)azo-kappaN1)-2-naphthalenesulfonato(3-))-, trihydrogen;Trihydrogen bis(6-hydroxy-5-((2-hydroxy-4-nitrophenyl)azo)naphthalene-2-sulphonato(3-))chromate(3-);chromic; 5-[[4-(dioxidoamino)-6-oxo-1-cyclohexa-2,4-dienylidene]hydrazono]-6-oxo-naphthalene-2-sulfonate; hydron; 5-(4-nitro-2-oxido-phenyl)azanidylimino-6-oxo-naphthalene-2-sulfonate