Carboxymethyl Cellulose (CMC), also known as E466 in the food industry, is a widely used food additive and industrial chemical. As a leading supplier of Carboxymethyl Cellulose E466, I'm often asked about its chemical formula and various properties. In this blog post, I'll delve into the chemical formula of Carboxymethyl Cellulose E466, its structure, properties, applications, and more.
Chemical Formula of Carboxymethyl Cellulose E466
The chemical formula of Carboxymethyl Cellulose E466 is generally represented as [C₆H₇O₂(OH)₃₋ₓ(OCH₂COONa)ₓ]ₙ, where "x" represents the degree of substitution (DS), which can range from 0.3 to 1.5, and "n" indicates the degree of polymerization. This formula shows that Carboxymethyl Cellulose is a derivative of cellulose, which is a natural polymer composed of glucose units linked by β - 1,4 - glycosidic bonds. In the process of carboxymethylation, some of the hydroxyl groups (-OH) on the glucose units are replaced by carboxymethyl groups (-OCH₂COONa).
The degree of substitution (DS) is a crucial parameter for Carboxymethyl Cellulose. It refers to the average number of carboxymethyl groups per glucose unit. A higher DS value means more hydroxyl groups have been substituted, which will significantly affect the properties of Carboxymethyl Cellulose, such as solubility, viscosity, and stability. For example, Carboxymethyl Cellulose with a high DS is more soluble in water and has better stability in acidic and alkaline environments.
Structure of Carboxymethyl Cellulose
Cellulose is a linear polymer consisting of repeating D - glucose units. When cellulose is chemically modified to form Carboxymethyl Cellulose, the carboxymethyl groups are introduced randomly along the cellulose chain. The presence of these carboxymethyl groups disrupts the regular hydrogen - bonding network in cellulose, which makes Carboxymethyl Cellulose more soluble in water compared to native cellulose.
The sodium salt form of Carboxymethyl Cellulose, which is the most common form used in industry, has an ionic nature due to the presence of sodium ions (Na⁺) associated with the carboxymethyl groups. This ionic nature gives Carboxymethyl Cellulose unique properties, such as the ability to form highly viscous solutions at low concentrations, which is very useful in many applications.
Properties of Carboxymethyl Cellulose E466
Solubility
Carboxymethyl Cellulose is soluble in water, forming clear or slightly opalescent solutions. The solubility depends on the degree of substitution and the molecular weight of the polymer. Generally, Carboxymethyl Cellulose with a higher DS and lower molecular weight is more soluble in water. It can also dissolve in some polar organic solvents under certain conditions.
Viscosity
One of the most important properties of Carboxymethyl Cellulose is its ability to increase the viscosity of solutions. When Carboxymethyl Cellulose is dissolved in water, the long - chain polymer molecules entangle with each other, creating a three - dimensional network that resists flow. The viscosity of the solution can be adjusted by changing the concentration of Carboxymethyl Cellulose, the degree of substitution, and the molecular weight. Higher concentrations, higher molecular weights, and appropriate degrees of substitution usually result in higher viscosities.
Stability
Carboxymethyl Cellulose is relatively stable under normal conditions. It can withstand a wide range of pH values, from acidic to alkaline. However, extreme pH values and high temperatures may cause some degradation of the polymer. In acidic conditions, the carboxymethyl groups may be protonated, which can reduce the solubility and viscosity of the solution. In alkaline conditions, the polymer is generally more stable, but long - term exposure to high - pH solutions may also lead to some hydrolysis of the glycosidic bonds.
Applications of Carboxymethyl Cellulose E466
Food Industry
In the food industry, Carboxymethyl Cellulose E466 is used as a thickener, stabilizer, emulsifier, and binder. It can improve the texture and stability of food products, such as ice cream, yogurt, salad dressings, and baked goods. For example, in ice cream, Carboxymethyl Cellulose can prevent the formation of ice crystals, making the ice cream smoother and creamier. You can learn more about its applications in food at CMC Carboxymethyl Cellulose.
Pharmaceutical Industry
In the pharmaceutical industry, Carboxymethyl Cellulose is used as a binder in tablets, a suspending agent in liquid medications, and a lubricant in capsule formulations. It can improve the physical properties of drugs, such as the dissolution rate and stability. For example, as a binder in tablets, it helps to hold the active ingredients and excipients together, ensuring the integrity of the tablet during manufacturing and storage. You can find more details about the pharmaceutical applications at Carboxymethyl Cellulose Sodium.
Other Industries
Carboxymethyl Cellulose also has applications in many other industries. In the textile industry, it is used as a sizing agent to improve the weaving performance of yarns. In the oil and gas industry, it is used as a drilling fluid additive to control the viscosity and filtration properties of the drilling mud. In the paper industry, it is used as a wet - end additive to improve the strength and retention of paper. More information about its industrial applications can be found at Sodium Carboxymethyl.
Quality Control in Carboxymethyl Cellulose E466 Supply
As a supplier of Carboxymethyl Cellulose E466, we pay great attention to quality control. We use advanced production techniques to ensure the consistency of the degree of substitution and molecular weight of our products. Our Carboxymethyl Cellulose products are tested rigorously in our in - house laboratories for various parameters, such as viscosity, pH value, moisture content, and heavy metal content.
We also comply with international quality standards and regulations, such as the Food Chemicals Codex (FCC) and the European Food Safety Authority (EFSA) regulations for food additives. This ensures that our products are safe and of high quality for use in different industries.
Why Choose Our Carboxymethyl Cellulose E466
- High - Quality Products: Our Carboxymethyl Cellulose E466 is produced with strict quality control, ensuring consistent performance and high purity.
- Customized Solutions: We can provide Carboxymethyl Cellulose products with different degrees of substitution and molecular weights according to your specific requirements.
- Excellent Customer Service: Our professional sales and technical teams are always ready to provide you with technical support and after - sales service.
If you are interested in our Carboxymethyl Cellulose E466 products, or if you have any questions about its chemical formula, properties, or applications, please feel free to contact us for further discussion and potential procurement. We look forward to establishing long - term business relationships with you.
References
- Davidson, R. L., & Sittig, M. (1968). Water - soluble gums and resins handbook. McGraw - Hill.
- Mikkelsen, D. (2006). Carboxymethyl cellulose. In Encyclopedia of food science and technology (Vol. 1, pp. 267 - 272). John Wiley & Sons.
- Rinaudo, M. (2008). Main properties and current applications of some polysaccharides as biomaterials. Polymer International, 57(3), 397 - 430.
