1-Naphthalenesulfonic acid, 8-(phenylamino)-5-((4-(phenylazo)-6(or 7)-sulfo-1-naphthalenyl)azo)- 4-(4-Phenylamino-5-sulfo-1-naphthylazo)-6-(or 7)-sulfo-1-naphthaleneazobenzene 70833-64-6 8-(Phenylamino)-5-((4-(phenylazo)-(6or7)-sulpho-1-naphthyl)azo)naphthalene-1-sulphonic acid EINECS 274-922-9