Synonyms: Chromate(3-), bis(3-(hydroxy-kappaO)-4-(2-(2-(hydroxy-kappaO)-1-naphthalenyl)diazenyl-kappaN1)-1-naphthalenesulfonato(3-))-, hydrogen (1:3), nitro derivs.;Chromium dye from chromium acetate, 3-hydroxy-4-((2-hydroxynaphth-1-yl)azo)-1-naphthalenesulfonic acid, 3-hydroxy-4-((2-hydroxynaphth-1-yl)azo)-7-nitro-1-naphthalenesulfonic acid;Chromate(3-), bis(3-hydroxy-4-((2-hydroxy-1-naphthalenyl)azo)-1-naphthalenesulfonato(3-))-, trihydrogen, nitro derivs.