perfluorooctanoic acid pfoa, perfluorooctanoate carcinogenic pollutant molecule. skeletal formula.

perfluorooctanoic acid pfoa perfluorooctanoate carcinogenic pollutant molecule skeletal formula c8 perfluorinated carboxylic fluorine fluorosurfactant surfactant toxicant cancer persistent organic environment ptfe organofluorine blood serum plasma fluorotelomer toxicology atoms atomic molecular compound composition chemical chemistry structure line drawing flat icon