Hydroxyethyl Cellulose (HEC) in Cosmetics

 Hydroxyethyl Cellulose (HEC) is a non-ionic water-soluble natural polymer derivative derived from natural cellulose with good biocompatibility and biodegradability. Due to its excellent thickening, suspension, emulsification, film-forming and moisturizing properties, HEC is widely used in cosmetics and personal care products.

The main function of HEC in cosmetics

1.1. Thickener and rheology regulator

The most significant function of HEC is as a thickener. It can effectively increase the viscosity of the aqueous system, form a transparent and stable colloidal structure, and make cosmetics easier to apply and adhere to the skin or hair surface. It is sensitive to shear force, has good rheological properties when used, and can provide a comfortable feel.

1.2. Suspension and stabilization

In products containing solid particles or emulsions, HEC can help disperse and stabilize these particles, prevent sedimentation or stratification, and improve the physical stability of the formula.

1.3. Moisturizing and film-forming function

HEC has excellent film-forming properties and can form a flexible and breathable protective film on the surface of the skin or hair, slowing down water loss and thus playing a moisturizing role.

1.4. Emulsification assistance and thickening effect

Although HEC is not a traditional emulsifier, it is often used in conjunction with emulsifiers to assist emulsification and adjust the viscosity of the emulsion, enhancing the stability and texture of the emulsion.

1.5. Mild and non-irritating, strong compatibility

HEC is a non-ionic polymer that is non-irritating to the skin and eyes and is suitable for all skin types, including sensitive skin. At the same time, it has good compatibility with a variety of active ingredients, surfactants, salts, alcohol, etc.

Application of HEC in different types of cosmetics

2.1. Shampoo and conditioner

HEC is often used as a thickener and suspending agent in shampoo products. It can make the shampoo texture smooth and improve fluidity, while reducing slippage during use, improving foam stability, and increasing comfort. In conditioners, HEC can form a protective film, making hair soft, smooth and shiny.

2.2. Cleansing products

In cleansing milk and cleansing gel, HEC can be used as a thickener and can also help suspend ingredients such as scrub particles, activated carbon, and enzymes to improve the stability and dispersion of the product.

2.3. Facial masks and moisturizing lotions

HEC can form a good touch and adhesion in facial mask products, making the mask more docile. In moisturizing lotions and essences, HEC increases viscosity and helps active ingredients to be evenly distributed on the skin surface, while forming a moisturizing film.

2.4. Makeup products

In makeup such as mascara, eyeliner, and foundation, HEC provides good consistency and film-forming properties, making the product less likely to smudge or clump, and keeping the makeup effect long-lasting.

2.5. Shaving products and moisturizing gels

HEC can provide lubricity in shaving foams and gels, reducing irritation to the skin during shaving; at the same time, it also gives the product a certain degree of viscoelasticity, making it easier to distribute and rinse.

Advantages of using HEC

Natural source, safe and environmentally friendly: derived from natural cellulose, in line with the trend of green sustainable development.

Non-irritating, gentle skin care: suitable for sensitive skin, high safety.

Good transparency, adaptable to a variety of formulas: strong compatibility, suitable for transparent gels and lotions.

Wide pH range: Applicable to a wide pH range (usually pH 3–10), suitable for various types of cosmetics.

Can be cold or hot mixed: adapt to various production processes, easy to prepare and operate.

Precautions for use

Dissolution method: HEC will slowly swell after being dispersed in cold water. It is recommended to use high shear stirring or pre-dispersed under low temperature conditions, and then heat up to dissolve to avoid agglomeration.

Storage conditions: Dry powder should be stored in a sealed manner to prevent moisture absorption and deterioration.

Problems with coexistence with electrolytes: Although HEC has good tolerance to salt, the amount used still needs to be controlled in a high-salt environment to prevent gel instability.

Hydroxyethyl cellulose (HEC) has become one of the indispensable functional raw materials in cosmetic formulas due to its excellent thickening, film-forming and stability, as well as its natural origin, mildness and non-irritation. It has shown wide application potential in many fields such as washing, skin care, and makeup. As consumers pay more and more attention to natural and safe cosmetics, the application prospects of HEC will be broader.