Sodium carboxymethyl starch is a kind of modified starch, also known as CMS, shape: white or yellow powder, odorless, tasteless, non-toxic, moisture absorption. Soluble in water to form colloidal solution, stable to light and heat. It is insoluble in ethanol, ether, chloroform and other organic solvents. The product has similar properties with CMC, such as thickening, suspension, dispersion, emulsification, adhesion, water retention, colloid protection and so on. It can be used as emulsifier, thickener, dispersant, stabilizer, sizing agent, film-forming agent, water retaining agent, etc. it is widely used in petroleum, textile, daily chemical, cigarette, paper making, construction, food, medicine and other industrial departments, and is known as "industrial monosodium glutamate".