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hydroxyethyl cellulose cas number

Hydroxyethyl Cellulose An Overview

Hydroxyethyl cellulose (HEC) is a non-ionic, water-soluble polymer derived from cellulose, a natural polymer and the primary component of plant cell walls. HEC is synthesized by reacting cellulose with ethylene oxide, resulting in a compound that has a wide range of applications in various industries, including pharmaceuticals, cosmetics, food, and construction. Its chemical structure enables it to function as a thickening agent, emulsifier, stabilizer, and binder, making it an indispensable ingredient in many formulations.

Chemical Structure and Properties

HEC's chemical structure features hydroxyethyl groups attached to the cellulose backbone. This modification enhances its solubility in cold water and improves its performance in aqueous systems. The degree of substitution, which refers to the average number of hydroxyethyl groups per glucose unit of cellulose, influences the polymer's viscosity, solubility, and behavior in different applications. HEC can be tailored to meet specific requirements, allowing for its versatility in formulation.

One of the key properties of hydroxyethyl cellulose is its ability to form gels and enhance the viscosity of solutions. It exhibits pseudoplastic behavior, meaning that it becomes less viscous under shear stress, making it ideal for applications where easy dispersion and application are essential. Upon standing, HEC solutions regain their viscosity, providing excellent stability.

Applications

HEC is widely used in various sectors due to its favorable properties

1. Pharmaceuticals In the pharmaceutical industry, hydroxyethyl cellulose is utilized as a binding agent in tablet formulations, as well as a thickener in topical gels and lotions. It aids in sustaining drug release and improves the bioavailability of active ingredients.

2. Cosmetics and Personal Care HEC serves as a thickening agent and stabilizer in cosmetics, contributing to the texture and feel of products such as creams, lotions, and shampoos. Its ability to provide a good sensory feel and emulsion stability has made it a popular choice among formulators.

hydroxyethyl cellulose cas number

3. Food Industry In food applications, HEC acts as a food additive, providing improved texture and mouthfeel in various products like sauces, dressings, and baked goods. Its non-toxic nature and safety profile contribute to its desirability in food formulations.

4. Construction Hydroxyethyl cellulose is used in construction materials, such as cement, mortar, and plaster. It improves workability, water retention, and adhesion, making it essential for high-performance building materials.

5. Agriculture HEC finds applications in agricultural products where it serves as a stabilizer for water-based pesticides and herbicides, enhancing their effectiveness by promoting uniform dispersion and adherence to plant surfaces.

Environmental Impact and Safety

One of the significant advantages of hydroxyethyl cellulose is its biodegradable nature, which makes it an environmentally friendly alternative to synthetic polymers. Its non-toxic properties further enhance its appeal for use across various applications, particularly in pharmaceuticals and food products.

HEC has been extensively studied for safety, and it is generally recognized as safe (GRAS) by regulatory agencies when used appropriately. However, as with any chemical substance, it is crucial for users to follow proper handling guidelines and conduct appropriate testing, especially in new applications or formulations.

Conclusion

In conclusion, hydroxyethyl cellulose is a versatile and valuable polymer with a broad range of applications across multiple industries. Its unique properties, including water solubility, thickening ability, and non-toxic nature, make it an essential ingredient in pharmaceuticals, cosmetics, food products, construction materials, and agricultural applications. As industries continue to innovate and seek sustainable solutions, HEC's role is likely to expand, offering environmentally friendly alternatives that meet consumer demands for safe and effective products.

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