Poly(ethylene glycol-ran-propylene glycol) monobutyl ether is used as a nonionic surfactant solvent and formulation aid in pharmaceutical cosmetic industrial and chemical applications where it enhances the solubility and dispersion of active ingredients.

Its purpose is to improve solubilization emulsification wetting and formulation stability thereby enhancing the performance and consistency of pharmaceutical and industrial products.

Poly(ethylene glycol-ran-propylene glycol) monobutyl ether is a random copolymer of ethylene glycol and propylene glycol terminated with a butyl ether group.