Used as an anionic surfactant and emulsifying agent in cosmetic and pharmaceutical formulations. It helps stabilize oil-in-water emulsions, improving the texture and consistency of creams and lotions. Its ethoxylated structure provides good solubility in water and compatibility with various active ingredients. Also functions as a wetting agent and dispersant in topical delivery systems, enhancing skin penetration of drugs. Commonly found in dermatological preparations due to its mildness and low irritation potential.