A series of monoazo disperse dyes based on 5,6-diphenyl-2,3-dihydro-3-oxopyridazine-4-carbohydrazide was prepared by reacting with
azobenzeneacetylacetone, ethyl azobenzeneacetoacetate, and azobenzenemalononitrile derivatives. The dyeing performance of these dyes
was assessed on polyester fabrics. The dyes were found to give yellow to brown color shades on dyeing with good depth levelness on
fabrics. The dye bath exhaustion, fixation and fastness properties of the dye were also determined
Key words: 5,6-diphenyl-2,3-dihydro-3-oxopyridazine-4-carbohydrazide; disperse dyes; dyeing; fixation; fastness
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