PFOA stands for perfluorooctanoic acid and its ammonium-containing main salt, C8, which is a synthetic chemical and is usually an indispensable processing aid for producing high-performance fluoropolymers. The potential toxicity, widespread incidence and persistence of PFOA virus in people of all ages have aroused great concern of the American public and supervision bureau. According to this document, PFOA can cause liver cancer, pancreatic cancer and testicular cancer in animals. PFOA is listed as a carcinogen in California Proposal 65. The Union of Environmental and Labor Groups has been looking for solutions. In 1985, GERALDL studied the effects of different doses of PFOA on the skin, weight and liver of animals. Studies have shown that POFA is a moderately toxic liver carcinogen, which can increase the risk of human cancer. However, PFOS does not degrade in the environment and organisms, and has strong bioaccumulation, which can cause lipid metabolism disorder, energy metabolism disorder, and induce peroxide and embryo toxicity. It's banned now.