Properties and Viscosity of CMC

CMC is the sodium salt of cellulose carboxymethyl ether, which is an anionic cellulose ether, and is currently used as a food additive to meet national food safety testing standards.

With the rapid development of China's pharmaceutical industry and the improvement of drug quality standards, the importance of pharmaceutical excipients in the production of pharmaceutical preparations is gradually recognized, and their status in the production of drugs and dosage form development is increasing.

Main properties

CMC is white or creamy white fibrous powder or granule, density 0.5-0.7 g/cm3, almost odorless, tasteless, with moisture absorption. It is easily dispersed in water as a transparent gel solution, but insoluble in organic solvents such as ethanol.
Stable to heat, viscosity rises rapidly below 20℃, changes slowly at 45℃, long time heating above 80℃ can make its colloid denatured and viscosity and performance drop obviously.
It is easily soluble in water and the solution is transparent; it is stable in alkaline solution, but easily hydrolyzed when it meets acid, and it will precipitate when the PH value is 2-3, and it will also react and precipitate when it meets multivalent metal salt.
Main uses: Used as thickener in food industry (As a thickener and stabilizer for acidic dairy products, CMC prevents the protein in the dairy products from coagulating, precipitating and layering, makes the dairy products a unique and delicate taste); drug carrier in pharmaceutical industry; binder and anti-settling agent in daily use chemical industry.

CMC Viscosity

Viscosity is an important factor in judging the quality and performance of CMC, and its use is very wide, involving the food industry, daily chemical industry, etc., which is also very related to its viscosity, so what are the requirements of viscosity for different industries?
Building decoration and other industries with CMC from 200 ~ 1200 upper limit may also be higher viscosity; washing class CMC viscosity of 10 ~ 70 (100 below); food grade CMC viscosity are in the 1000 above, a variety of industries due to the use of different uses and the choice of viscosity will vary.
Viscosity is often one of the more critical indicators of CMC-Na, viscosity figures and liquid concentration, temperature, shear efficiency, etc. Although CMC is widely used, but in actual use should also pay attention to its scope of use and precautions, it should be noted that CMC-Na with strong acids, strong alkalis, heavy metal ions are contraindicated, please carefully read the instructions or consult the manufacturer before use.

High Viscosity Petroleum Oil Drilling Grade CMC White Powder

Battery grade CMC

Due to the poor water solubility of the acidic structure of carboxymethyl cellulose, CMC is a very widely used material in the production of batteries in order to better apply it.

CMC products are widely used by domestic and foreign battery manufacturers as the main binder for aqueous system cathode materials. The optimal amount of binder can obtain relatively large battery capacity, more cycle life and relatively low internal resistance.

CMC carboxymethyl cellulose sodium used in the battery, it will have the same quality of the use of the effect it has, and at the same time also provides it with good performance, with the current use of the effect.

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