Fiber reactive yellow monoazo compound having two vinylsulfone type groups.

摘要

A monoazo compound of the following formula, <CHEM> wherein D is sulfonaphthyl, sulfophenyl or carboxyphenyl, any one of A1 and A2 is sulfo and the other is hydrogen, methoxy or ethoxy, R1 and R2 are independently hydrogen or alkyl, B1 and B2 are independently phenylene or naphthylene, and Y1 and Y2 are indpendently vinyl, beta -sulfatoethyl or the like, which is useful for dyeing or printing fiber materials to give dyed or printed products of a deep color excellent in fastness properties.