Polyethylene glycol mono(4-tert-octylphenyl) ether surfactant is a non-denaturing detergent that solubilizes lipid membranes. Polyethylene glycol mono(4-tert-octylphenyl) ether surfactant is commonly used in laboratories and is applied to vaccines at different stages of the manufacturing process. Polyethylene glycol mono(4-tert-octylphenyl) ether surfactant is listed as an excipient in certain vaccines including split virus influenza vaccines. Polyethylene glycol mono(4-tert-octylphenyl) ether surfactant is a nonionic surfactant. Polyethylene glycol mono(4-tert-octylphenyl) ether surfactant induces Apoptosis in prostate and colon cancer cell lines and reduces the infectivity of classic enveloped viruses such as WNV[1][2][3][4][5].