hydroxyethyl cellulose cas number

Understanding Hydroxyethyl Cellulose Properties, Applications, and CAS Number

Hydroxyethyl cellulose (HEC) is a non-ionic, water-soluble polymer derived from cellulose. Its chemical formula is typically represented as C₂₄H₅₁O₁₆, and it is identified by the CAS number 9004-62-0. The unique properties of HEC make it a versatile compound that finds extensive use in various industries, including pharmaceuticals, cosmetics, food, and construction. In this article, we will explore the characteristics, applications, and significance of hydroxyethyl cellulose in different fields.

Chemical Structure and Properties

Hydroxyethyl cellulose is formed by the etherification of cellulose, which involves the substitution of hydroxyl groups in cellulose with hydroxyethyl groups. This modification enhances the solubility of the cellulose derivative in water, enabling it to dissolve easily at room temperature. The ability of HEC to form clear and viscous solutions is largely due to its molecular weight, which can vary significantly depending on the production process.

One of the key properties of hydroxyethyl cellulose is its thickening ability. When dissolved in water, HEC creates a gel-like texture, making it an excellent thickener for a wide range of applications. Additionally, HEC exhibits pseudoplastic behavior, meaning its viscosity decreases under shear stress—this characteristic is particularly useful in formulations that require easy application, such as sprays or spreads.

Other notable properties of HEC include its stability across a wide pH range, resistance to microbial growth, and compatibility with various other ingredients, making it suitable for formulating different products without compromising their integrity.

Applications of Hydroxyethyl Cellulose

1. Pharmaceuticals In the pharmaceutical industry, hydroxyethyl cellulose is frequently used as a thickening agent in ointments, creams, and gels. Its ability to stabilize emulsions and suspensions is crucial for drug delivery systems, where uniform distribution of active ingredients is necessary. HEC is also employed as a binder in tablet formulations, enhancing the overall stability and performance of the medication.

2. Cosmetics The cosmetic industry benefits immensely from HEC’s thickening and stabilizing properties. It is commonly used in hair gels, lotions, and creams, where it helps maintain consistency and improves the application experience. Additionally, HEC acts as a film-forming agent, providing a protective layer on the skin and enhancing the overall sensory aspects of cosmetic products.

3. Food Industry Hydroxyethyl cellulose is recognized as a food additive (E461) and is used to improve the texture and mouthfeel of various food products. It aids in moisture retention and can enhance the shelf life of baked goods. Furthermore, HEC can act as a fat replacer, allowing for healthier formulations without sacrificing quality or taste.

4. Construction and Building Materials In construction, hydroxyethyl cellulose is utilized as a thickening agent in tile adhesives, mortars, and plasters. Its water retention capabilities allow for extended work time and improved adhesion properties, making it invaluable in building applications.

Importance of CAS Number

The CAS number, which stands for Chemical Abstracts Service number, serves as a unique identifier for chemical substances. For hydroxyethyl cellulose, the CAS number 9004-62-0 is crucial for regulatory compliance and safety assessments. It allows manufacturers, researchers, and consumers to accurately identify and reference the specific compound, facilitating communication and collaboration across various industries.

Conclusion

Hydroxyethyl cellulose is a versatile compound with a broad spectrum of applications across multiple industries. Its unique properties, including thickening, stabilizing, and emulsifying capabilities, make it an essential ingredient in pharmaceuticals, cosmetics, food products, and construction materials. Understanding its characteristics, along with its CAS number, is crucial for professionals involved in product development, quality assurance, and regulatory compliance. As research continues to expand on cellulose derivatives, hydroxyethyl cellulose remains a key player in the advancement of innovative formulations and applications.