| abstract |
A monoazo compound which is useful for dyeing or printing fiber materials, particularly cellulose fiber materials in red color, and which is represented by a free acid of the formula,n wherein D is a phenyl group substituted with one to three substituents selected from the group consisting of halogen atoms and methyl, ethyl, methoxy, ethoxy, acetylamino, propionylamino, sulfo and carboxyl groups, R is a C 1 to C 4 alkyl group unsubstituted or substituted with a halogen atom or a hydroxyl, cyano, alkyl, alkoxy, carboxyl, carbamoyl, alkoxycarbonyl or sulfo group, A is a phenylene group unsubstituted or substituted with one or two substituents selected from the group consisting of methyl, ethyl, methoxy, ethoxy and sulfo groups and chlorine and bromine atoms, or a naphthylene group unsubstituted or substituted with one sulfo group, and X is -S0 2 CH=CH 2 or -S0 2 CH 2 CH 2 Y in which Y is a group capable of being splitted by the action of an alkali. |