The present invention relates to a reactive orange dye containing vinyl sulfone
and more particularly, to the dye which have 6(7)-alkoxycarbonylamino-4-hydroxy-2-naphthalenesulfonic
acid as a chromophore and aminophenyl--ethylsulfone derivative as an azo
coupler. This dye provides excellent fastness in terms of light, washing, perspiration
and chlorine as well as better dyeing yield than other monofunctional reactive
dye. In Formula (1), M is alkaline metal atom; Z is —O—SO3M
or OC(O)CH3; R is alkyl group having 1-4 of carbon atom; and a position
of C6 or C7 is substituted with carbamate group.