Physical Properties Of Carboxymethyl Cellulose

Carboxymethyl cellulose (CMC) is an anionic cellulose ether, which is white or yellowish flocculent fiber powder or white powder in appearance, odorless, tasteless and non-toxic; It is easily soluble in cold water or hot water to form a transparent solution with a certain viscosity. The solution is neutral or slightly alkaline, insoluble in ethanol, ether, isopropanol, acetone and other organic solvents, and soluble in ethanol or acetone solution containing 60% water. It has hygroscopicity and is stable to light and heat. Its viscosity decreases with the increase of temperature. The solution is stable at pH 2~10. When pH is lower than 2, there are solid precipitates. When pH is higher than 10, its viscosity decreases. The discoloration temperature is 227 ℃, the carbonization temperature is 252 ℃, and the surface tension of 2% aqueous solution is 71 mn/n.