Synthesis, characterization and application of reactive dyes based on 4,4'-diamino diphenyl sulphonamide on various fibres

Ten hot brand reactive dyes have been prepared by coupling tetrazotised 4, 4’-diaminodiphenyl sulphonamide with 2-chloro-4-nitro anilino cyanurated coupling components and their dyeing performance on silk, wool, cotton fibres has been assessed. All the dyes give well to very good light fastness on each fibre. Purity of all the dyes was checked by Thin Layer Chromatography (TLC). The structures of all the dyes have been confirmed by Nitrogen Elemental Analysis, FTIR, 1H-NMR spectra and UV visible spectra. The percentage dye-bath exhaustion on different fibres are reasonable good and acceptable. The dyed fibres showed moderate to very good fastness to light, washing and rubbing.