the present invention provides disazo reactive dyestuffs containing the quaternary group compounds of the general formula wherein r , 0 ˜ 3 , 0 ˜ 3 , y 1 and y 2 are defined the same as the specification . the dyes of the invention are distinguished by high fixation and a very good build - up . they are distinguished also by high washing off and a low nylon stain , and they have fiber - reactive properties and are very highly suitable for dyeing and printing of materials containing either cellulose fibers , such as cotton , synthetic cotton , hemp , and synthetic hemp , or amide containing fibers such as wool and nylon .