Polyoxyethylene(10) oleyl ether, also known as POE(10) monooleate, is a nonionic surfactant consisting of a polyethylene glycol chain with 10 ethylene oxide units and an oleic acid residue. It has excellent emulsifying, wetting and dispersing properties, making it suitable for a variety of applications including personal care products and pharmaceutical formulations. POE(10) monooleate is commonly used as a solubilizer to improve the solubility and bioavailability of poorly soluble drugs. Furthermore, it is biodegradable and has low toxicity, making it an environmentally friendly ingredient suitable for various industrial applications.