Carboxymethyl cellulose

Carboxymethyl cellulose (CMC) or cellulose gum is a cellulose derivative with carboxymethyl groups (-CH₂-COOH) bound to some of the hydroxyl groups of the glucopyranose monomers that make up the cellulose backbone. It is often used in its sodium salt form, sodium carboxymethyl cellulose. It used to be marketed under the name Tylose, a registered trademark of SE Tylose. The sodium salt is used pharmaceutically as an artificial lubricant for the eye in a 0.25% solution in water under the brand name Theratears. An injectable form has been investigated for use as a soft tissue filler. It is also used as a wound dressing under multiple brand names.