Code of Federal Regulations Title 21. Food and Drugs § 21.582.1745 Sodium carboxymethylcellulose

(a) Product. Sodium carboxymethylcellulose is the sodium salt of carboxymethylcellulose not less than 99.5 percent on a dry-weight basis, with maximum substitution of 0.95 carboxymethyl groups per anhydroglucose unit, and with a minimum viscosity of 25 centipoises for 2 percent by weight aqueous solution at 25° C.

(b) Conditions of use. This substance is generally recognized as safe when used in accordance with good manufacturing or feeding practice.