sodium 5-[[4-acetamido-2-[(p-tolyl)sulphonyl]phenyl]azo]-6-amino-4-hydroxynaphthalene-2-sulphonate;5-[[4-(Acetylamino)-2-[(4-methylphenyl)sulfonyl]phenyl]azo]-6-amino-4-hydroxy-2-naphthalenesulfonic acid sodium salt;C.I.17080
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