Sodium carboxymethyl cellulose (sodiumcarboxymethylcellulose, CMC), is the carboxymethylated cellulose derivatives, also known as cellulose gum, belong to anionic Chemicalbook cellulose ether, is one of the main ionic cellulose gum. It is an anionic polymer compound, usually derived from the reaction of natural cellulose with caustic alkali and monochloroacetic acid. The molecular weight of the compound varies from several thousand to millions

The properties of sodium carboxymethyl cellulose are as follows: 1. Hygroscopic characteristics, the degree of hygroscopic is related to atmospheric temperature and relative humidity, and when it reaches equilibrium, it is no longer hygroscopic. 2.CMC aqueous solution has excellent bonding, thickening, emulsification, suspension, film formation, colloidal protection, water retention, anti-enzymatic hydrolysis and metabolic inertia properties. 3. When CMC aqueous solution meets tin, silver, aluminum lead, iron, copper and some heavy gold chemicalbooks, precipitation reaction will occur; When CMC aqueous solution coexists with calcium, magnesium, and salt, precipitation will not occur, but the viscosity of CMC aqueous solution will be reduced. When CMC aqueous solution encounters acid, acid CMC precipitation will be precipitated. However, acid-resistant CMC has certain resistance to acid solution. 4. Solubility: CMC aqueous solution and water-soluble animal glue, glycerol glycol, sorbitol, Arabi