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Hot brand bisazo reactive dyes (D1 to D10) have been synthesized by coupling tetrazotised 4,4’-Methylene Bis-Orthonilic Acid with various cyanurated coupling components. They were applied on silk, wool and cotton fibres. Their dyeing performance on silk, wool and cotton has been assessed. The purity of dyes was checked by thin layer chromatography. The IR spectra showed all characteristic band and PMR spectra of representative dye showed all the signals. The percentage dye bath exhaustion on different fibres was reasonably good and acceptable. The dyed fibres showed moderate to very good fastness to light, washing and rubbing.
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Patel et al. (2024) studied this question.
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