Carboxymethyl cellulose, also call CMC, its white or slightly yellow flocculent fiber powder or white powder, odorless, tasteless, non-toxic; soluble in cold water or hot water to form a certain stick degree transparent solution. Carboxymethyl cellulose-CMC in the pharmaceutical, cosmetic, oil, drilling, paper, textile, printing and dyeing industry, construction and other fields has been widely used in production.