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