Para Amino Azo Benzene - 4 - Sulphonic Acid (PAABSA) Vinyl Sulphone (Aniline / Acetanilide / Ester Of Aniline) Vinyl Sulphone (Meta Base) Vinyl Sulphone (2 : 5 DMA Base) Vinyl Sulphone (Para Cresidine Base) Vinyl Sulphone (O.A. Base) Vinyl Sulphone (Pyrazolone) 1 : 4 Sulphophenyl - 3 - Carboxy - 5 - Pyrazolone (1 : 4 SPCP) 1 : 3 Sulphophenyl - 3 - Carboxy - 5 - Pyrazolone (1 : 3 SPCP)