Benzenesulfonicacid, 4-[(2-hydroxy-1-naphthalenyl)azo]-3-methyl- (9CI); m-Toluenesulfonicacid, 4-[(2-hydroxy-1-naphthyl)azo]- (7CI);1-(2'-Methyl-4'-sulfophenylazo)-2-naphthol;4-(2-Hydroxy-1-naphthylazo)-m-toluenesulfonic acid
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