ABSTRACT
Compared with perfluorooctanesulfonate (PFOS), 6:2 fluorotelomer sulfonate (6:2 FTS) is less toxic and environmentally persistent, and is not as bioaccumulative. Environmental monitoring studies suggest that 6:2 FTS occurs at relatively low levels at most sites, the exception being point sources. Unlike many PFASs, 6:2 FTS can be degraded under certain conditions to short-chain perfluorcarboxlic acids, such as perfluorohexanoic acid and perfluoropentanoic acid. This section evaluates the limited 6:2 FTS toxicity data. The lack of data prevents derivation of toxicity reference values (TRVs).
