Hebei Maiyuan Chemical Industry Co Ltd, located in the Jinzhou city of Hebei Province in P R China, has developed an extra-high D.S CMC named CT80H, which through special technology, has solved the weakness of easy to impact reactive dyes of the traditional CMC, and the CT 80 H can be used in reactive dyes directly. CT 80 H can be used, instead of the sodium Alginate, as the thickener in reactive dyes.