PFOS and its closely related compounds, which contain PFOS impurities or substances which can give rise to PFOS, are members of the large family of perfluoroalkyl sulfonate substances.
全氟辛烷磺酸和与之密切相关的化合物，即包含全氟辛烷磺酸杂质或能够形成全氟辛烷磺酸的物质，都是全氟烃基磺酸盐物质大族系中的成员。