PFOA, also known as perfluorooctanoic acid, is a synthetic chemical that has been used in a variety of industrial and commercial applications. It is a key ingredient in the manufacture of Teflon, a non-stick coating used in cookware and other products. PFOA has also been used in the production of firefighting foams, stain-resistant coatings for carpets and clothing, and other products. Despite its widespread use, PFOA has been linked to a range of serious health problems in both humans and animals.