Carboxymethyl cellulose is a commonly used food additive, and its sodium salt is often used as a thickener and paste. Carboxymethyl cellulose is called industrial monosodium glutamate, which is widely used in industrial production and brings great use value to various production fields. Carboxymethyl cellulose is a powdery substance, non-toxic, but it is easy to dissolve in water. It is soluble in cold water and hot water, but it is insoluble in organic solvents. It will become a viscous liquid after dissolving, but the viscosity will vary due to temperature rise and fall.Sodium carboxymethyl cellulose (CMC) has many functions in food, such as thickening, emulsification, suspension, water retention, toughness enhancement, puffing and freshness preservation, etc. Its properties are unmatched by other thickeners. Used in food, it can improve the taste, improve the grade and quality of the product, and extend the shelf life.