Benzenesulfonicacid, 5-chloro-2-[(2-hydroxy-1-naphthalenyl)azo]-4-methyl- (9CI); C.I. PigmentRed 53 (7CI,8CI); p-Toluenesulfonic acid, 5-chloro-2-(2-hydroxy-1-naphthylazo)-(5CI)
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