Fiber reactive monoazo yellow dye

摘要

A monoazo fiber reactive dye of the formula: <IMAGE> wherein X and Y are independently selected from beta -sulfatoethyl, beta -thiosulfatoethyl and beta -phosphatoethyl group and R is hydrogen, and C1-C4 alkyl; preferably methyl. These dyes are useful in conducting exhaust dyeings at low dye bath salt concentrations.