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- Each and every PFAS is a unique compound. PFOA and PFOS were the original chemicals developed in this family. Industries and companies in the United States have phased out the manufacture and use of PFOA and PFOS. They also phased out the use of perfluorohexane sulfonic acid (PFHxS), another long chain PFAS compound.
- Smaller PFAS chemicals, such as perfluorobutane sulfonic acid (PFBS) and perfluorobutanoic acid (PFBA) are still manufactured today. According to scientists, PFBS and PFBA are eliminated from our bodies within days and do not present any human health concerns at low levels.