Synonyms: Chrome Blue Black B; C.I. 14640; Eriochromeblueblack;Mordant Black 3; Sodium 3-hydroxy-4-[(1-hydroxy-2-naphthyl)azo]naphthalene-1-sulphonate; Mordant Black 3;C.I. 14640; Eriochrome Blue Black B;3-Hydroxy-4-(1-hydroxy-2-naphthylazo)-1-naphthalenesulfonic acid, sodium salt; eriochrome blue black B (C.I. 14640);