| abstract |
An asymmetric dioxazine compound of the following formula: <IMAGE> (I) <IMAGE> wherein R is sulfo, halogeno, alkoxy, alkyl or carboxy; R1 and R2 are each hydrogen or alkyl; R3 is hydrogen, alkyl or acyl; X1 and X2 are each hydrogen, halogeno, alkyl, alkoxy or phenoxy; Y is aliphatic amino having a vinylsulfonyl or beta -substituted ethylsulfonyl fiber-reactive group; and Q is unsubstitued, substituted or cyclic amino; is useful for dyeing or printing fiber materials blue with excellence in build-up properties and various fastness properties. |