Hydroxyethylcellulose is a polymer derived from cellulose, a natural substance found in plants. It is used in the cosmetics and personal care industry as a thickener, stabilizer and gelling agent. Hydroxyethylcellulose is water soluble and forms clear, viscous gels when mixed with liquids. It is used in products such as hair gels, creams, lotions, and masks for its thickening, moisturizing, and texture-enhancing properties. It also contributes to the stability and consistency of cosmetic products.