Karboksimetüültselluloos

Karboksimetüültselluloos, often abbreviated as CMC, is a cellulose derivative and a soluble fiber. It is produced by reacting cellulose with chloroacetic acid in the presence of an alkali. This process introduces carboxymethyl groups onto the cellulose backbone, making it water-soluble and conferring various useful properties.

CMC is a white to off-white, odorless, and tasteless powder that readily dissolves in water to form a viscous solution. Its viscosity can be controlled by the degree of substitution and the molecular weight of the polymer. It is widely used in a variety of industries due to its thickening, stabilizing, emulsifying, and binding properties.

In the food industry, CMC is employed as a food additive, designated by the number E466. It functions as a thickener in products like ice cream, sauces, and baked goods, and as a stabilizer in beverages and dairy products. It helps to improve texture, prevent ingredient separation, and extend shelf life.

Beyond food, CMC finds significant applications in pharmaceuticals. It serves as a binder and disintegrant in tablets, a suspending agent in liquid medications, and a viscosity modifier in eye drops. Its biocompatibility and low toxicity make it a suitable excipient.

In the paper industry, CMC is used as a surface sizing agent to improve paper strength and printability. It is also utilized in detergents as an anti-redeposition agent, preventing dirt from settling back onto fabrics during washing. Other uses include applications in textiles, cosmetics, drilling fluids, and adhesives. CMC is generally considered safe for consumption and use in various products.