What is PFHxS and its salts and related compounds?
The currently regulated "perfluorohexanesulfonic acid (PFHxS), its salts, and PFHxS related compounds" refer to the following:
a. Perfluorohexanesulfonic acid (CAS No. 355-46-4, PFHxS), including branched isomers;
b. Its salt;
c. Any substance containing the chemical part C6F13SO2- as one of its structural elements that may decompose into PFHxS.
What are the characteristics of PFHxS substances?
PFHxS substances belong to the PFAS class, which have strong carbon fluorine bonds and anti degradation properties, making them highly resistant to chemical, thermal, and biological degradation. They have persistence, long-range migration, high toxicity, and bioaccumulation in the environment. Relevant evidence suggests that substances such as PFHxS cause global pollution to the environment, wildlife, and humans, accumulating in the human body and posing a direct threat to human health. The pollution of these substances is exacerbating the biodiversity crisis.
