Used as a biodegradable surfactant and emulsifier in cosmetic formulations, particularly in gentle cleansers and moisturizing creams. Its polyether chain provides excellent water solubility and humectant properties, helping to retain skin moisture. Frequently found in low-irritancy personal care products due to its mild interaction with skin and compatibility with other ingredients. Also serves as a solubilizer for fragrances and essential oils in aqueous systems.