Hydroxyethyl cellulose (HEC) is a water-soluble, synthetic, nonionic polymer made from cellulose, a natural polymer. It is commonly used as a thickener, binder, emulsifier, and suspending agent in various industrial applications.

In technical industries, HEC is used as a thickener and binder in drilling fluids, construction materials, and coatings. It helps improve the viscosity and stability of these materials and enhances their ability to adhere to surfaces. In the cosmetic and personal care industry, it is used as a thickener and emulsifier in hair care and skin care products.