4'-(4-fluorophenyl)acetanilide is a biphenyl that is 1,1'-biphenyl substituted by a fluoro group at position 4 and a acetylamino group at position 4'. It induces neoplastic lesions in rats. It has a role as a carcinogenic agent. It is a N-acetylarylamine, a secondary carboxamide, a member of biphenyls and a member of monofluorobenzenes.