Polyethylene-Polypropylene Glycol is a block copolymer of ethylene oxide and propylene oxide, commonly referred to as a polyether. It is a nonionic surfactant used as a solubilizer, dispersant, emulsifier, and viscosity modifier. Due to its amphiphilic nature, it stabilizes oil-in-water systems and enhances the performance of detergents and cleaners. It is widely used in cosmetics, pharmaceuticals, and industrial applications.