Disazo compounds and use thereof as fiber reactive dyes.

摘要

A bisazo compound of the following formula: <CHEM> wherein R<1> and R<3> are each hydrogen or alkyl; D is phenylene or naphthylene; one of X<1> and X<2> is NH2 and the other is OH; Z<1> and Z<2> are each -CH=CH2 or -CH=CH2Z' in which Z' is a splittable group; B is monosulfophenylene, monosulfophenylene-methylene or mono- or disulfonaphthylene-methylene; U is phenylene or an aliphatic bridging group; and J is an amono-derivative group or, J may be alkoxy when X<1> is OH and U is phenylene, and J may be alkoxy or phenoxy when X<1> is OH and U is the aliphatic bridging group. This compound is useful for dyeing or printing fiber materials and gives a dyed or printed product having a color superior in various fastness properties with superior build-up property.