2,7-Naphthalenedisulfonic acid, 4-hydroxy-5-((4-(phenylamino)-5-sulfo-1-naphthalenyl)azo)-, ammonium sodium salt 5-((4-Anilino-5-sulpho-1-naphthyl)azo)-4-hydroxynaphthalene-2,7-disulphonic acid, ammonium sodium salt 83006-78-4 EINECS 280-128-3