1-Naphthalenesulfonicacid, 3-hydroxy-4-[(1-hydroxy-2-naphthalenyl)azo]-7-nitro- (9CI);2-Naphthol-4-sulfonic acid, 1-(1-hydroxy-2-naphthylazo)-6-nitro- (6CI); C.I.Mordant Black 11 (8CI); C.I. Mordant Black 11, free acid (7CI);1-[(1-Hydroxy-2-naphthyl)azo]-2-hydroxy-6-nitro-4-sulfonaphthalene;1-[(1-Hydroxy-2-naphthyl)azo]-2-naphthol-6-nitro-4-sulfonic acid; EriochromeBlack T free acid
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