perfluorooctanesulfonic acid molecule, pfos, molecular structure, 3d model van der waals

perfluorooctanesulfonic acid pfos perfluorooctanesulfonate perfluorosulfonic molecule molecular structure chemical formula isolated model c8hf17o3s atom pollutant chemistry compound toxic blood plasma fabric poison disruption organic persistent carbon oxygen science atomic drawing hydrogen skeletal protector line sulfur disruptor endocrine fluorosurfactant neonatal organofluorine perfluorooctane precursor sulfonate research scientific fluorine