Carboxymethyl cellulose CAS#9000-11-7

CMC is an important cellulose ether, a water-soluble anionic polymer obtained through chemical modification of natural fibers. It is soluble in both cold and hot water. It possesses unique and valuable physicochemical properties, including emulsifying and dispersing abilities, resistance to degradation, and physiological inertness, making it a widely used natural polymer derivative.

Product Usage

Food Applications

As an effective thickener and stabilizer, CMC improves food texture and mouthfeel by increasing viscosity (e.g., providing a smooth texture to ice cream and preventing whey separation in yogurt).  It also works synergistically with proteins and starches to prevent ingredient separation and extend shelf life. In low-fat foods, it can replace fat, mimicking the smooth, creamy texture of traditional products.

Battery Applications

In zinc-manganese/lithium-ion batteries, CMC acts as an electrolyte thickener, forming a gel network to stabilize the electrolyte and prevent leakage, while also promoting ion migration and improving conductivity.  In the electrode, it functions as a binder, enhancing the adhesion between the active material and the current collector, and reducing structural collapse during repeated charge/discharge cycles.

Pharmaceutical Applications

As a pharmaceutical binder and controlled-release carrier, CMC improves tablet formulation and controls drug release rate; in medical dressings, it forms a moisturizing gel layer that promotes wound healing, while also possessing good biocompatibility and safety.