RW acid, Bis-(5-hydroxy-7-sulfo-naphthyl-(2))-amin, 4,4'-dihydroxy-7,7'-iminodi(naphthalene-2-sulfonic acid), J Acid Imide, 5.5'-Dioxy-(di-naphthyl-(2)-amin)-disulfonsaeure-(7.7'), 4,4'-dihydroxy-7,7'-imino-bis-naphthalene-2-sulfonic acid, 2-Naphthalenesulfonic acid,7'-iminobis[4-hydroxy, 4,4'-Dihydroxy-7,7'-imino-bis-naphthalin-2-sulfonsaeure, 2,2-DIMETHYL-6-NITRO-CHROMAN-4-ONE, Rhoduline Acid, Di-J acid, 6,6'-Iminobis(1-hydroxy-3-sulfonaphthalene), I Acid Imide