Reactive dye.

摘要

A monoazo compound represented by a free acid of the formula: <CHEM> wherein R1 and R2 independently represent a hydrogen atom, or an alkyl, aralkyl or cyclohexyl group, R3 represents a hydrogen atom or a methyl or sulfonic acid group: R4 represents a hydrogen atom or an alkyl group; A represents an oxygen atom or -NH-; X1 and X2 independently represent a hydrogen or chlorine atom or a methyl, methoxy, carboxyior sulfonic acid group; and Y represents -CH=CH2 or -CH2CH2Z (Z represents a halogen atom. -OSO3H or -OPO3H2). This compound is used for dyeing cellulose fibers to give dyed products of yellow to red dish yellow having excellent fastnesses, particularly chlorine fastness.