Carboxymethyl cellulose (CMC) is a water-soluble polymer compound obtained by chemically modifying natural cellulose. It is a cellulose derivative and is widely used in many fields due to its excellent physical and chemical properties.

1. Food industry
In the food industry, carboxymethyl cellulose is mainly used as a thickener, stabilizer, emulsifier and humectant. It has good water solubility and high viscosity, and can effectively adjust the taste and texture of food. Common applications include:
Beverages and juices: CMC can be used as a thickener and stabilizer to improve the taste and stability of beverages and prevent the precipitation of solid substances such as pulp in juices.
Ice cream and frozen foods: Using CMC in ice cream can increase its emulsification, improve the taste, prevent the formation of ice crystals, and maintain its density.
Sauces and condiments: CMC can effectively increase the thickness of sauces, prevent stratification, and increase their consistency and texture.
Bread and baked goods: As a humectant, CMC helps to maintain the moisture of food, extend the shelf life, and improve the taste of the product.

2. Pharmaceutical industry
In the pharmaceutical field, carboxymethyl cellulose is widely used in pharmaceutical preparations due to its biocompatibility and non-toxicity, especially in pharmaceutical processes and dosage form design. Specific uses include:
Pharmaceutical excipients: CMC is often used as a molding agent and adhesive for tablets and capsules, which can improve the drug release characteristics and taste of the drug and help the drug to be evenly dispersed.
Ophthalmic preparations: In eye drops and eye ointments, CMC is used as a viscosity enhancer, which can effectively relieve dry eyes and improve the adhesion of eye drops.
Hydrogel: In drug sustained release and local administration, CMC hydrogel has good drug loading properties, which can effectively control the drug release rate and improve the efficacy.
Oral care products: In toothpaste and mouthwash, CMC is used as a thickener and viscosity regulator to enhance the stability and feel of the product.

3. Cosmetics Industry
In the cosmetics industry, carboxymethyl cellulose is also widely used, mainly in thickening, moisturizing and emulsification. It plays an important role in the following products:
Cream and lotion: As a thickener and emulsifier, CMC can help adjust the texture of the product, making the cream and lotion have a more delicate and smooth application feel.
Shampoo and shower gel: In these personal care products, CMC can improve the foaming, viscosity and stability of the product and enhance the use experience.
Facial mask and skin care products: In some facial masks and skin care creams, CMC helps to enhance the moisturizing effect of the product, prevent water loss, and keep the skin soft and smooth.

4. Paper and textile industry
In paper production, carboxymethyl cellulose, as a thickener and moisturizer, can improve the wet strength and water resistance of paper. In the textile industry, it is mainly used as a binder for dyes and printing:
Paper processing: CMC can improve the surface smoothness and wear resistance of paper and increase the strength of paper. It can also be used in the paper coating process as a thickener and rheology regulator.
Textile printing: In the textile printing process, CMC is used as a thickener to increase the viscosity of the printing and dyeing slurry, ensure that the dye is evenly attached to the fiber surface, and prevent color running and color difference.

5. Petroleum and mineral mining
In the process of petroleum drilling and mineral mining, carboxymethyl cellulose is widely used in mud and liquid stabilizers. It can improve the fluidity of the liquid and increase the viscosity of the liquid, thereby improving drilling efficiency and preventing mine collapse. Specifically including:
Drilling fluid: CMC can enhance the rheological properties of drilling fluid, reduce liquid loss, and improve stability during drilling.
Ore flotation: In the flotation process of minerals, CMC, as a binder and dispersant, can help ore particles better disperse in water and enhance the flotation effect.

6. Environmental protection
The application of carboxymethyl cellulose in environmental protection has also received increasing attention, especially in water treatment and waste management:
Water treatment: CMC can be used as a flocculant to help remove suspended matter in water and improve water purification effects.
Wastewater treatment: In wastewater treatment, CMC, as an adsorbent and stabilizer, can effectively remove harmful substances in wastewater and improve water treatment efficiency.

7. Other applications
In addition to the above fields, carboxymethyl cellulose is also used in many other industries and fields. For example:
Building materials: CMC, as a thickener, can be used in the preparation of cement and gypsum to improve its fluidity and operability.
Agriculture: In agriculture, CMC, as a soil conditioner and fertilizer enhancer, can improve water retention and promote crop growth.

Carboxymethyl cellulose has been widely used in food, medicine, cosmetics, textiles, oil extraction, environmental protection and other fields due to its excellent thickening, stabilization, moisturizing and emulsification properties. With the continuous advancement of technology, the application field of CMC is also expanding, and its importance in daily life is increasing.