Carboxymethyl cellulose starch (CMS) is a substitute for modified starch and belongs to ether starch. It is a water-soluble anionic polymer compound. Odorless, tasteless, non-toxic, heat and moisture absorption. Soluble in water to form a colloidal solution. Light and heat stable. Insoluble in alcohol, ether, chloroform and other organic solvents. It has various properties such as thickening, suspension, dispersion, emulsification, adhesion, water retention, and protective colloid. It can be used as emulsifier, thickener, dispersant, stabilizer, sizing agent, film-forming agent, water-retaining agent, etc.