A monoazo compound represented by the following formula in a free acid form,
wherein R is hydrogen or unsubstituted or substituted C1 to C4 alkyl, X is unsubstituted or substituted phenyl or naphthyl, Y is unsubstituted or substituted phenylene or napthylene, Z is-SO2CH=CH2 or -SO2CH2CH2Z1, in which Z1 is a splittable group by the action of an alkali, and R1 and R2 are independently hydrogen or unsubstituted or substituted C, to C4 alkyl, phenyl or benzyl, excepting the case where R1 and R2 are hydrogen, which is useful as reactive dyes of high solubility and good build-up property for giving dyed or printed products of a deep red colour excellent in fastness properties.
游离酸形式的下式所代表的单偶氮化合物、
其中 R 是氢或未取代或取代的 C1 至 C4 烷基,X 是未取代或取代的苯基或
萘基,Y 是未取代或取代的亚苯基或亚
萘基,Z 是-SO2CH=
CH2 或-SO2 Z1,其中 Z1 是在碱作用下可分裂的基团、R1 和 R2 独立地为氢或未取代或取代的 C 至 C4 烷基、苯基或苄基,但 R1 和 R2 为氢的情况除外,这种活性
染料具有高溶解性和良好的堆积性,可使染色或印花产品呈深红色,牢度极佳。