Polyethylene glycol 4-octylphenyl ether

Nonidet P-40 is a poly(ether) macromolecule that is polyethylene glycol in which one of the terminal hydroxy groups has been converted to the corresponding p-octylphenyl ether. A nonionic, non-denaturing detergent, it is used for solubilising membrane proteins during isolation of membrane-protein complexes. n 8. It has a role as a detergent. It is a poly(ethylene glycol) derivative, an aromatic ether and a hydroxypolyether. It is functionally related to a 4-octylphenol.