sentences:  Other synonyms are polyethylene glycol (PEG)-7 Nonyl phenyl ether, PEG-14 Nonyl phenyl ether, PEG-18 Nonyl phenyl ether and PEG-50 Nonyl phenyl ether.The precursor nonylphenol is derived from phenol and a mixture of nonenes.Nonoxynols have been used as detergents, emulsifiers and wetting agents in cosmetics, including hair products, and defoaming agents.