Synthesis and Characterization of Salicylic acid-derived Thiadiazol coupled Resorcinol for Textile Application on Terrycloth, Nylon, and Cotton Fiber

This study reports the synthesis, characterization, and application of a new azo-linked compound, 4-{(E)-[5-(2-hydroxyphenyl)]-1,3,4-thiadiazol-2-yl,diazenyl}benzene-1,3-diol, for textile applications. The compound was synthesized via diazotization and coupling reactions, with its structure confirmed by FT-IR, ¹H-NMR, and ¹³C-NMR spectroscopy. The dye’s fastness properties were assessed on Terrycloth, nylon, and Cotton Mesh under different conditions: neutral, alkaline (NaOH), and acidic (HCl) environments. Terrycloth exhibited excellent fastness properties across all tests, with minimal color fading. Nylon showed moderate resistance in neutral and acidic environments but was less stable under alkaline conditions. Cotton Mesh the lowest fastness, particularly under alkaline conditions, due to its cellulose-based structure, making it more prone to dye leaching. These results indicate the suitability of Terrycloth and Nylon for high-performance textile applications requiring color durability.