2-Naphthalenecarboxylicacid, 3-hydroxy-4-[(4-methyl-2-sulfophenyl)azo]- (9CI); 2-Naphthoic acid,3-hydroxy-4-(2-sulfo-p-tolylazo)- (6CI);4-[(2-Sulfo-4-methylphenyl)azo]-3-hydroxy-2-naphthoic acid; Vulcafix Rubine V
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