Synthesis and Properties of Acid Dyes Derived from 4,4'-Methylene bis(2,5-dichloro aniline)

Abstract

Various acid dyes have been prepared by coupling diazotized 4,4' -methylene-bis-(2,5-dichloro aniline) with various coupling components and their dyeing performance on silk, wool and nylon fibres has been assessed. All the dyes gave a wide range of shades with very good depth and levelness on each fibre. The purity of all the dyes has been checked by thin layer chromatography. The IR spectra showed all characteristic bands and representative dye PMR spectra showed all the signals. The percentage dye-bath exhaustion and fixation on different fibres was reasonably good and acceptable. The dyed fibres showed fair to excellent fastness to light, washing and rubbing.