Pentafluorobenzene
Pentafluorobenzene is a synthetic organofluoride compound with the molecular formula. The compound consists of a benzene ring substituted with five fluorine atoms. The substance is a colorless liquid with a boiling point similar to that of benzene.
It is prepared by defluorination of highly fluorinated cyclohexanes over hot nickel or iron. Another method involved dehydrofluorination of polyfluorinated cyclohexane using hot aqueous solution of potassium hydroxide.
It has been observed as a degradation by-product of the incineration of polytetrafluoroethylene and of biosolids.