Introduction：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 as its sodium salt, sodium carboxymethyl cellulose.
Appearance: white power, preswollen, microgranular
Molecular formula: 
    
Molecular weight: variable
CAS Number: 9000-11-7
Stability: Stable. Combustible. Incompatible with strong oxidizing agents.
Application: CMC is used in food science as a viscosity modifier or thickener, and to stabilize emulsions in various products including ice cream. As a food additive, it has E number E466. It is used primarily because it has high viscosity, is non-toxic, and is non-allergenic. CMC is used as a lubricant in non-volatile eye drops (artificial tears).
CMC is also used in the oil drilling industry as an ingredient of drilling mud, where it acts as a viscosity modifier and water retention agent. Poly-anionic cellulose or PAC is derived from CMC and is also used in oilfield practice..
CMC is also used in ice packs to form a eutectic mixture resulting in a lower freezing point and therefore more cooling capacity than ice.
Specification: CMC%≥99.5% (industrial grade)