Disperse violet H-FRL is suitable for dyeing polyester and its blended fabrics, dyeing polyester with high temperature and high pressure, and dyeing light to medium color. It can be used for hot-melt pad dyeing of polyester and cotton fabrics in the same bath with vat dyes, and for direct printing of polyester Chemicalbook cotton fabrics with reactive violet K-3R. Bleaching polyester-cotton fabrics can improve whiteness by padding with disperse violet H-FRL and fluorescent whitening agent DT in the same bath. It can also be used to dye triacetate, but not diacetate, nylon and acrylic.