A water soluble dye which contains a group of Formula : ##STR1## The dyes of Formula can be used to dye materials including natural and artificial textile materials such as wool, silk, {TAIL ~ polymides} and {HEAD ~ modified polyacrylonitrile fibers} 
A water soluble dye which contains a group of Formula : # # STR1 # # The dyes of Formula can be used to dye materials including natural and artificial textile materials such as wool , silk , { TAIL ~ polymides } and { HEAD ~ modified polyacrylonitrile fibers }
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