Makes products stain resistant, waterproof, and non-stick. (1)
(1) https://greensciencepolicy.org/highly-fluorinated-chemicals/
(2) https://link.springer.com/article/10.1007/s00204-009-0424-0
(3) https://ehjournal.biomedcentral.com/articles/10.1186/1476-069X-12-35
(4) https://academic.oup.com/toxsci/article/89/1/93/1663593
(5) https://academic.oup.com/toxsci/article-abstract/122/1/134/1670175
(6) https://www.sciencedirect.com/science/article/pii/S089062381400313X
(7) https://ehp.niehs.nih.gov/doi/full/10.1289/ehp.1002741
(8) https://www.ncbi.nlm.nih.gov/pubmed/31284113
(9) https://www.ncbi.nlm.nih.gov/pubmed/28669937
(10) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4977043/