2,7-Naphthalenedisulfonicacid, 3-hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)azo]- (9CI);2,7-Naphthalenedisulfonic acid,3-hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthyl)azo]- (8CI);1-(2-Hydroxy-4-sulfonaphthylazo)-2-naphthol-3,6-disulfonic acid
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