2-Naphthalenesulfonic acid, 7,7'-iminobis(4-hydroxy- 4,4'-Dihydroxy-7,7'-iminodi(naphthalene-2-sulphonic acid) 6,6'-Iminobis(1-hydroxy-3-sulfonaphthalene) 87-03-6 Di-J acid EINECS 201-719-4 I Acid Imide J Acid Imide NSC 1698 RW acid Rhoduline Acid