Some new disperse azo dyes based on Schiff base of ninhydrin and 4-amino phenol were prepared by coupling of various diazo solution of b enzene derivatives. The resultant dyes were characterized by elemental analyses as well as IR a nd NMR spectral studies. The UV-Visible spectral data have also been discussed in terms of structural property relationship. All the disperse azo dyes were applied on polyester textile fibers. The percentage dye bath exhaustion and fixation on the polyester fibers have been foun d to be very good. The dyied fabrics showed moderate to very good light fastness and washing fa stness properties.