Noun
perfluorooctane (countable and uncountable, plural perfluorooctanes)
(organic chemistry) A derivative of octane, C8F18, in which every hydrogen atom has been replaced by those of fluorine
There are a dozen PFCs that were in common use including Perfluorooctanoic acid (PFOA) and Perfluorooctane sulfonate (PFOS). Source: Internet