hydroxyethyl cellulose cas number

Understanding Hydroxyethyl Cellulose (HEC) Properties, Applications, and CAS Number

Hydroxyethyl cellulose (HEC) is a water-soluble polymer that has gained significant attention in various industries due to its unique properties and wide range of applications. With the Chemical Abstracts Service (CAS) number 9004-62-0, HEC is a derivative of cellulose, one of the most abundant organic polymers found in nature. Its fascinating attributes make it an essential component in products ranging from pharmaceuticals to cosmetics and construction materials.

Chemical Structure and Properties

HEC is produced by the hydroxyethylation of cellulose, which involves the reaction of cellulose with ethylene oxide in an alkaline environment. This process introduces hydroxyethyl groups into the cellulose chain, enhancing its solubility in water. As a non-ionic cellulose ether, HEC has several distinctive properties

1. Water Solubility HEC is highly soluble in water, forming a clear and viscous solution. This property makes it an excellent thickening agent. 2. Thickening Ability HEC can significantly increase the viscosity of solutions even at low concentrations. This characteristic is particularly valuable in formulating creams, lotions, and gels.

3. Stabilization HEC helps to stabilize emulsions and suspensions, preventing the separation of ingredients in many formulations, which is crucial for maintaining product quality.

4. Film-Forming The polymer exhibits the ability to form thin films, lending itself well to applications in coatings and adhesives.

5. Biocompatibility HEC is non-toxic and biodegradable, making it suitable for use in cosmetic and pharmaceutical products.

Applications of Hydroxyethyl Cellulose

1. Pharmaceuticals In the pharmaceutical sector, HEC is commonly used as a thickening agent, binder, and excipient in the formulation of oral tablets and suspensions. Its film-forming ability is exploited in controlled release formulations, ensuring that active ingredients are released gradually over time.

2. Personal Care Products In the cosmetics industry, HEC is employed in lotions, shampoos, and other personal care products due to its thickening and emulsifying capabilities. It enhances the texture and stability of products, contributing to an improved consumer experience.

3. Construction HEC is increasingly used in the construction industry as an additive in cement, plaster, and tile adhesives. Its ability to retain water allows for improved workability and adhesion, while also reducing the risk of cracking in dried products.

4. Food Industry Although less common, HEC is occasionally utilized as a thickener and stabilizer in food products, ensuring homogeneity and enhancing texture without altering flavor.

5. Agriculture HEC can be found in agricultural formulations, where it acts as a thickening agent in herbicides and pesticides, improving the adhesion of these products to plant surfaces.

Safety and Regulatory Aspects

HEC is generally regarded as safe for use in various applications, particularly in cosmetics and pharmaceuticals. Regulatory agencies such as the FDA, European Commission, and others have approved its use within established limits. However, it is vital for manufacturers and formulators to adhere to good manufacturing practices (GMP) to ensure product safety and quality.

Conclusion

Hydroxyethyl cellulose (CAS Number 9004-62-0) is a remarkable material with diverse applications spanning pharmaceuticals, personal care products, construction, and more. Its excellent solubility, thickening, and stabilizing properties make it an invaluable additive in various formulations. As industries continue to innovate and seek sustainable solutions, HEC is likely to maintain its relevance, supported by its non-toxic nature and biocompatibility. Understanding the properties and benefits of hydroxyethyl cellulose is crucial for manufacturers looking to enhance their products and meet consumer demands for quality and performance. As research and technology evolve, the potential applications of HEC may expand even further, solidifying its role as a key ingredient in modern formulations.