CAS number 9004-62-0 is the chemical identification number of Hydroxyethyl Cellulose (HEC). Hydroxyethyl Cellulose is a non-ionic water-soluble polymer commonly used in various industrial and daily products with thickening, stabilization, film-forming and hydration properties. It has a wide range of applications, covering coatings, construction, food, medicine, cosmetics and other fields.
1. Basic properties of Hydroxyethyl Cellulose
Molecular formula: Depending on its degree of polymerization, it is a cellulose derivative;
CAS number: 9004-62-0;
Appearance: Hydroxyethyl Cellulose usually appears in the form of white or light yellow powder, with odorless and tasteless characteristics;
Solubility: HEC can be dissolved in both cold and hot water, has good solubility and stability, and forms a transparent or translucent solution after dissolution.
Preparation of Hydroxyethyl Cellulose
Hydroxyethyl Cellulose is prepared by chemically reacting cellulose with ethylene oxide. In this process, ethylene oxide reacts with the hydroxyl group of cellulose through an etherification reaction to obtain hydroxyethylated cellulose. By adjusting the reaction conditions, the degree of hydroxyethyl substitution can be controlled, thereby adjusting the water solubility, viscosity and other physical properties of HEC.
2. Physical and chemical properties of hydroxyethyl cellulose
Viscosity regulation: Hydroxyethyl cellulose is an effective thickener and is widely used to adjust the viscosity of liquids. Its solution viscosity depends on the solubility concentration, degree of polymerization and degree of substitution, so its rheological properties can be controlled by adjusting the molecular weight;
Surface activity: Since HEC molecules contain a large number of hydroxyl groups, they can form a molecular film on the interface, play the role of a surfactant, and help stabilize emulsions and suspension systems;
Film-forming property: Hydroxyethyl cellulose can form a uniform film after drying, so it is widely used in cosmetics, pharmaceutical coatings and other fields;
Moisture retention: Hydroxyethyl cellulose has good hydration, can absorb and retain moisture, and helps to extend the moisturizing time of the product.
3. Application areas
Coatings and building materials: HEC is a commonly used thickener and stabilizer in the coating industry. It can improve the rheology of the coating, make the coating more uniform, and avoid sagging. In building materials, it is used in cement mortar, gypsum, putty powder, etc., to improve construction performance, enhance water retention and improve crack resistance.
Daily chemicals: In cosmetics and personal care products, HEC is often used in shampoo, shower gel, lotion and other products to provide thickening and suspension stabilization, while enhancing moisturizing effect.
Food industry: Although HEC is rarely used in food, it can be used as a thickener and stabilizer in certain specific foods such as ice cream and condiments.
Medical field: HEC is mainly used as a thickener and a matrix for capsules in pharmaceutical preparations, especially in ophthalmic drugs for the manufacture of artificial tears.
Papermaking industry: HEC is used as a paper enhancer, surface smoothener and coating additive in the papermaking industry.
4. Advantages of hydroxyethyl cellulose
Good solubility: HEC is easily soluble in water and can quickly form a viscous solution.
Wide application adaptability: HEC is suitable for a variety of media and pH environments.
Good chemical stability: HEC is relatively stable in a variety of solvents and temperatures and can maintain its functions for a long time.
5. Health and safety of hydroxyethyl cellulose
Hydroxyethyl cellulose is generally considered to be a substance that is harmless to the human body. It is not toxic and does not irritate the skin or eyes, so it is widely used in cosmetics and medicines. In the environment, HEC also has good biodegradability and does not cause environmental pollution.
Hydroxyethyl cellulose represented by CAS No. 9004-62-0 is a multifunctional polymer material with excellent performance. Due to its thickening, stabilization, film-forming, moisturizing and other properties, it is widely used in various aspects of industrial production and daily life.
Post time: Oct-29-2024