eng Ansari Education and Research Society Journal of Ultra Chemistry 0973-3450 2319-8036 January 2018 14 1 8 13 http://dx.doi.org/10.22147/juc/140102 576 article MITCHLA S. M 1 PATEL F. T. 1 MALIK G. M. (gmmalik2010@gmail.com) 1 Department of Chemistry, Navyug Science College, Surat, Gujarat (India) <p style="text-align: justify;">Here in this paper we report a new series of 1,3,4-thiadiazole based heterocyclic monoazo dyes which have been derived by the diazotization of N4-(5-benzyl-1,3,4-thiadiazol-2-yl)-1,3-thiazole-2,4-diamine with various phenyl pyrazolone as coupling components. The structure of the synthesized dyes was characterized by elemental analysis, IR, 1H NMR and UV spectroscopy with a view to determine their chemical structure. All the synthesized compounds were evaluated for their dyeing performance and fastness properties. The synthesized disperse dyes were found to possess very good dyeing properties.</p> https://journalofchemistry.org/paper/576/ Heterocyclic dyes 5-benzyl-1,3,4-thiadiazole-2-amine Monoazo dyes Pyrazolone Dyeing performance