A series of monoazo disperse dyes have been prepared by coupling 2-amino-3-carbethoxy-4. 5-dimethylthiophene with various N-arylmaleimides. The monoazo disperse dyes were characterised by IR spectral studies and elemental analysis. These dyes were applied at 2 % depth on polyester fabrics and gave light yellow to brown colour hues with fair fastness to light and very good to excellent... https://www.roneverhart.com/Persol-3195-S-58mm/