Carboxymethyl starch (abbreviation: CMS): when starch reacts with monochloroacetic cid under the alkalinity condition, double-molecule nucleophilic substitution reaction occurs, and get starch etherification derivant through carboxymethylation. The range of polymerization degree is 100 - 200. Carboxymethyl starch can dissolve in water in room temperature, and form colorless, transparent and sticky solution with the characters of emulsifying dispersivity, solid dispersivity, non-putrefaction and no toxicity. It is a brand-new food adjunct with better fluidity, permeability, thickening property, enhancing tackiness, water-binding power and oilphobicity. It can be used exclusively or with other thickening agents. CMS is widely used in the process of fruit tea, jam, cans, condiments, yoghourt, ice cream, cream, bread, cakes, vermicelli, instant noodles and other foods, as well used as profession adjunct for toothpastes, printing and dyeing, tobaccos, medicines, thus get the effects of thickening, stabilizing, emulsifying, water-binding and adhesion, transnature. It could well improve food quality, taste and flavor, being safe, without toxicity or side-effect, and can be regarded as new-generation of food adjunct. Inner packing: Packed with plastic packet Outer packing: Packed with kraft paper packet