Carboxymethyl cellulose

Carboxymethyl cellulose Chemische Eigenschaften,Einsatz,Produktion Methoden

• Chemische Eigenschaften

  White or almost white powder, hygroscopic.

• Chemische Eigenschaften

  Cellulose is a natural substance normally present in most diets because it is the major structural carbohydrate of green plants. Cellulose is essentially a linear polymer of glucopyranose units connected by α-1,4-glucoside links. In nature, cellulose is present in plant cell walls as fibers. The molecular weight of the isolated cellulose is approximately 50,000 daltons. The principal sources of cellulose for food-related purposes are cotton linters and wood pulp.
  Chemical processing converts cellulose into forms or derivatives suitable for incorporation into food products or for use in food packaging materials. For food use, the optimum degree of substitution of a carboxymethyl-residue on each anhydroglucopyranose unit on cellulose is 0.95. By preliminary mild acid hydrolysis, the degree of polymerization (i.e., molecular size) of the cellulose may be reduced before carboxymethylation. Control of the degree of substitution and the degree of polymerization during processing results in production of a wide variety of derivatives that differ in such physical properties as gelling, temperature, viscosity and dispersibility in water. Sodium carboxymethyl cellulose is used as a thickening agent and stabilizer in foods. Because carboxymethyl cellulose is spontaneously converted to sodium salt in alkaline solution, it is probable that any distinction between carboxymethyl cellulose and sodium carboxymethyl cellulose in foodstuffs is artificial.*

• Verwenden

  Carboxymethylcellulose(CMC) is a gum that is water-soluble cellulose ether manufactured by reacting sodium monochloroacetate with alkali cellulose to form sodium . It dissolves in hot or cold water and is fairly stable over a pH range of 5.0–10.0, but acidification below pH 5.0 will reduce the viscosity and stability except in a special acid-stable type of CMC. A variety of types are available which differ in viscosity and degree of substitution (the number of sodium groups per unit). It functions as a thickener, stabilizer, binder, film former, and suspending agent. It is used in a variety of foods to include dressings, ice cream, baked goods, puddings, and sauces. The usage range is from 0.05 to 0.5%. Also termed cellulose gum.

• Verwenden

  Pharmaceutic aid (suspending agent); pharmaceutic aid (tablet excipient); pharmaceutic aid (viscosity-increasing agent).

• Verwenden

  carboxymethyl cellulose (cellulose gum) is a thickener. used in cosmetic formulations when a reactant is not required or desired. often used in bath preparations, beauty masks, hand creams, and shampoos. It is considered a non-comedogenic raw material.

• synthetische

  Sodium carboxymethyl cellulose is produced by treating wood pulp or cotton linters with alkali and monochloroacetic acid. It occurs as a white- or cream-colored powder or granules.

• Trademarks

  Celluvisc (Allergan); Refresh Plus, Cellufresh Formula (Allergan).

• Industrielle Verwendung

  Lignin sulfonate is used as dispersant, flocculant and depressant. Lignin is an amorphous polyphenolic compound derived from enzymatic polymerization of three phenylpropanoid monomers.

• Industrielle Verwendung

  Carboxymethyl cellulose is manufactured with molecular weights ranging from 50,000 to 800,000. Several modifications are of interest to flotation because they display good depressing properties for highly floatable magnesium-bearing minerals. These include sodium salts of phenolphthalein ether cellulose and ethanesulfo cellulose.

• Carcinogenicity

  Sarcomas were produced at the site of repeated subcutaneous injection of aqueous solutions of carboxymethylcellulose. It should be noted, however, that massive doses were given and therefore there must have been considerable local trauma.

Carboxymethyl cellulose Upstream-Materialien And Downstream Produkte

Carboxymethyl cellulose Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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