Synonyms: Chromate(1-), (4-hydroxy-6-(hydroxy-kappaO)-5-(2-(2-(hydroxy-kappaO)phenyl)diazenyl-kappaN1)-2-naphthalenesulfonato(3-))hydroxy-, sodium (1:1);Chromate(1-), (4,6-dihydroxy-5-((2-hydroxyphenyl)azo)-2-naphthalenesulfonato(3-))hydroxy-, sodium;Chromate(1-), (4-hydroxy-6-(hydroxy-kappaO)-5-((2-(hydroxy-kappaO)phenyl)azo-kappaN1)-2-naphthalenesulfonato(3-))hydroxy-, sodium;Sodium (4,6-dihydroxy-5-((2-hydroxyphenyl)azo)naphthalene-2-sulphonato(3-))hydroxychromate(1-);chromium(3+) sodium hydroxide (5E)-4-oxido-5-[2-(2-oxidophenyl)hydrazinylidene]-6-oxo-5,6-dihydronaphthalene-2-sulfonate (1:1:1:1)