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Sodium carboxymethyl cellulose (CMC) is a cellulose derivative, an ionic cellulose gum, and owing to its unique thickening, suspending, adhesion, and water retention properties, is widely used in various industrial fields.odium carboxymethyl cellulose is generally divided into 3 grades depending on the purity: the food high-purity grade (with a content more than 99.5%), the industrial grade (with a content more than 90%), and crude products (with a content more than 65%).
1 Acid Hydrolysis (Sulfuric Acid): Use the same cellulose sources as in enzymatic hydrolysis. 2  Add 0.2g cellulose to 10ml of 5% H 2 SO 4 solution in a lightly capped test tube. 3  See Note 3. 4  One may choose to carry out the reaction at 90Â°C instead of at room temperature.