Three azo dyes were synthesized via diazo-coupling reaction with 2-N,N-bis(methyl acetate) ami-no-4-acetamido-anisole as the coupling component , the 4-nitroaniline, 6-bromo-2,4-dinitroaniline and 2-amino-3, 5-dinitrothiophene as the diazo components , and characterized by UV-Vis, IR and 1 H NMR techniques .And their dyeing performance on polyester fabric , ethylated fir powder and benzylated fir powder was investigated .The results show that the maximum visible absorption of three dyes in DMF is at 520,570,609 nm, respectively, and the val-ues of molar extinction coefficient are over 104 .The...