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Sodium carboxymethyl cellulose is usually an anionic polymer compound obtained by reacting natural cellulose with caustic alkali and monochloroacetic acid, with a molecular weight ranging from several thousand to one million. CMC-Na is white fibrous or granular powder, odorless, tasteless, hygroscopic, easy to disperse in water to form a transparent colloidal solution.

Potassium sorbate​ is often used as a preservative. It destroys many enzyme systems by binding to the sulfhydryl group of the microbial enzyme system. Its toxicity is much lower than other preservatives and it is currently widely used. Potassium sorbate can fully exploit its antiseptic effect in an acidic environment, but has a low antiseptic effect under neutral conditions.

After eating, it is quickly hydrolyzed into amino acids under the physiological pH conditions of the human body and under the action of α-chymotrypsin. Food additive nisin will not change the normal flora in the human intestinal tract and cause resistance problems like other antibiotics, and will not It has cross-resistance with other antibiotics. It is a natural food preservative with high efficiency, non-toxicity, safety and no side effects.

L-glycine is a white to cream crystalline powder, odorless and non-toxic. Soluble in water, almost insoluble in ethanol or ether. It is used in pharmaceutical industry, biochemical testing and organic synthesis. It is an amino acid with the simplest structure in the amino acid series and is not essential for the human body. It has both acidic and alkaline functional groups in the molecule.