84878-22-8 Azo dye EINECS 284-412-8 Ferrate(1-), (3-((2,4-dihydroxy-5-((4-nitro-2-sulfophenyl)azo)phenyl)azo)-2-hydroxy-5-nitrobenzenesulfonato(4-))-, sodium Ferrate(1-), (3-((2-(hydroxy-kappaO)-4-hydroxy-5-((4-nitro-2-sulfophenyl)azo)phenyl)azo-kappaN1)-2-(hydroxy-kappaO)-5-nitrobenzenesulfonato(4-))-, sodium Sodium (3-((2,4-dihydroxy-5-((4-nitro-2-sulphophenyl)azo)phenyl)azo)-2-hydroxy-5-nitrobenzene-1-sulphonato(4-))ferrate(1-)