Para Nitro Toluene Ortho Sulphonic Acid (P.N.T.O.S.A.) | 4-4 Di-Nitro Stilbin 2-2 Disulphonic Acid (D.N.S.D.A.) | 4-4 Di-Amino Stilbin 2-2 Disulphonic Acid (D.A.S.D.A.) | 4-Nitro, 4-Amino Stilbin, 2-2 Disulphonic Acid (N.A.S.D.A.) | 3 Amino Benzene Sulphonic Acid (Metanilic Acid)