Used primarily as a non-ionic surfactant and emulsifying agent in cosmetic and pharmaceutical formulations. It helps stabilize emulsions by reducing surface tension between oil and water phases, making it effective in creams, lotions, and serums. Also serves as a solubilizer for fragrances and active ingredients in personal care products. Its polyether chain provides good water solubility and mildness on skin, suitable for sensitive formulations. Additionally, employed in drug delivery systems to improve the bioavailability of poorly soluble drugs due to its amphiphilic nature.