Research Article

Synthesis of Disperse Dyes from Pyridone and Resorcinol Coupled to Diazotized 2-Amino-4-chloro-5-formylthiazole and Application to Polyester

Table 2

UV spectral properties of dyes in different solvents.

DyeEthanol (a)Acetone (b)Dimethylformamide (DMF) (c)Ethanol + HCl (d)Change in
(a–d)
Molar extinction coefficient in DMF L Mol−1 104

Dye 1
Dye 2