Cellulose carboxymethyl ether

By the action of relatively small quantities of sodium chloroacetate on alkali cellulose, carboxymethyl ethers are obtained which give smooth solution in dilute alkali but which can be regenerated to give threads or films of high tensile strength. These products are relatively hygroscopic. The substances are soluble in the form of their sodium salts and form insoluble salts with many metals.8... [Pg.311]

Cellulose, carboxymethyl ether, sodium salt, crosslinked [74811-65-7]... [Pg.211]

Synonyms Cellulose carboxymethyl ether Classification Synthetic gum... [Pg.1028]

Synonyms Carbor ethylcellulose Carbor ethylcellulose, sodium salt Carboxymethyl ether cellulose sodium salt Cannellose sodium Cellulose carboxymethyl ether Cellulose carbor methyl ether sodium salt Cellulose glycolic acid sodium salt Cellulose gum (INCI) Cellulose, polyanionic Cellulose sodium glycolate CMC CMC sodium salt NaCMC SCMC Sodium carboxymethylcellulose Sodium cellulose glycolate Sodium CMC Sodium CMSodium salt of the polycarbot ethyl ether of cellulose Fornujia RnOCHjCOONa... [Pg.1028]

Cellulose acetopropionate. See Cellulose acetate propionate Cellulose carboxymethyl ether Cellulose carboxymethyl ether sodium salt. See Carboxymethylcellulose sodium Cellulose crystalline. See Cellulose Cellulose, 2,5-diacetate. See Cellulose acetate Cellulose ethyl Cellulose ethylate Cellulose ethyl ether. See Ethylcellu-lose... [Pg.1032]

Synonyms Calcium cellulose glycolate Carboxymethylcellulose calcium Carmellose calcium Cellulose carboxymethyl ether calcium salt... [Pg.673]

Synonyms Cellulose carboxymethyl ether Classification Synthetic gum Toxicology LD (oral, rat) > 5 g/kg LD50 (IV, mouse) 47 mg/kg shown to cause cancer in animals when ingested toxicity on skin not known may cause immune responses TSCA listed... [Pg.772]

Synonyms Carboxymethylcellulose Carboxymethylcellulose, sodium salt Carboxymethyl ether cellulose sodium salt Carmellose sodium Cellulose carboxymethyl ether... [Pg.772]

Cellulose carboxymethyl ether sodium salt Cellulose glycolic acid sodium salt Cellulose gum (INCI) Cellulose, polyanionic Cellulose sodium glycolate... [Pg.773]

Celluiose ac iphthaiate. See Hydroxypropyl methylcellulose phthalate Cellulose carboxymethyl ether sodium saK. See Carboxymethyiceiiuiose sodium... [Pg.2022]

Carboxymethylcellulose Sodium. Carboxymethyl ether of cellulose sodium salt (Citmcel) (8) is a white granular substance soluble in water depending on the degree of substitution. It is equally soluble in cold and hot water and may be prepared by treating alkaU cellulose with sodium chloroacetate. [Pg.200]

Carboxymethylcelluloses (CMC). CarboxymethylceUulose [9004 2-6] (CMC) is the carboxymethyl ether of cellulose. To prepare CMC, cellulose is steeped in sodium hydroxide solution, and the so-called alkaU cellulose is treated under controlled conditions with sodium monochloroacetate to form the sodium salt of CarboxymethylceUulose and sodium chloride. Therefore, the CMC of commerce is actuaUy sodium CarboxymethylceUulose... [Pg.489]

Cellulose may be converted from a water-insoluble polymer to a water-soluble polymer by the partial etherification of some of the hydroxyl groups by dimethyl sulfate. When the degree of substitution (DS) is 1.5 to 2.0, the hydrogen bonds are sufficiently weakened, and the methylcellulose is soluble in water. Carboxymethyl ethers, such as carboxymethylcellulose (CMC), are also water-soluble. The degree of solubility is related to the DS of the polymer and the pH of the solvent. [Pg.207]

Total hydrolysis of the polymers gave D-glucose only. Water-soluble derivatives (ethyl or carboxymethyl ethers) of the polymers were unaffected by a-amylase, but were partially hydrolyzed by a ceUulase preparation from Acdobader xylinum. The optical rotations of several preparations of this polyglucose and of cellulose (P 1150) in tetraethylammonium hydroxide were all 0°, thereby strongly suggesting that the polyglucoses are /S-D-linked.109... [Pg.455]

A homolog of carboxymethylcellulose, the carboxyethyl derivative, can be prepared by the condensation of such acrylic derivatives as acrylamide with alkali-cellulose.30 The homolog is water-soluble, and gives a clear, viscous solution. Proposed uses are similar to those mentioned for the carboxymethyl ether. [Pg.290]

Research on nasal powder drug delivery has employed polymers such as starch, dextrans, polyacrylic acid derivatives (e.g., carbopol, polycarbophil), cellulose derivatives (microcrystalline cellulose, semicrystalline cellulose, hydroxypropylmethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose), chitosan, sodium alginate, hyaluronans, and polyanhydrides such as poly(methyl vinyl ether-co-maleic anhydride) (PVM/MA). Many of these polymers have already been used as excipients in pharmaceutical formulations and are often referred to as first-generation bioadhesives [38-45], In nasal dry powder a single bioadhesive polymer or a... [Pg.655]

The only anionic group added to cellulose is the carboxymethyl (-0-CH2-C02 ) ether group. To introduce the carbox)miethyl group, alkali cellulose is reacted with chloroacetic acid. (The carboxymethyl ether is also the ether of glycolic acid.) Also prepared commercially is car-boxymethylhydroxyethylcellulose. [Pg.1521]