Oleth-10 is a polyethylene glycol ether of oleyl alcohol with an average of 10 ethylene oxide units. It is a nonionic surfactant commonly used as an emulsifier, solubilizer, and dispersing agent in cosmetics and personal care formulations. Known for stabilizing oil-in-water emulsions, it improves texture and spreadability. Oleth-10 is widely applied in creams, lotions, shampoos, and other personal care products due to its mildness and compatibility.