Fiber reactive dyestuffs

摘要

A fiber reactive dyestuff of the following formula (I) wherein the definition of D, R, R₁, R₂, X and Z have the same meaning as given in the specification. The fiber reactive dyestuff of the present invention is suitable for dyeing and printing on cellulose fiber or fiber materials containing cellulose. Dyed material with various excellent properties in dyed color can be obtained, showing especially outstanding performance in the property of wash fastness, build-up and chlorine fastness.