21 CFR 582.1745 - Sodium carboxymethylcellulose.
(a) Product. Sodium carboxymethyl- cellulose 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.
Title 21 published on 2014-04-01
no entries appear in the Federal Register after this date.