PFHxS

PFHxS (Perfluorohexane sulfonic acid) is a human-made chemical from the PFAS (forever chemical) family, known for its persistence in the environment and bodies; it was used in products like stain-resistant fabrics, firefighting foams, and food packaging, but its production has largely ceased in the U.S., though it remains a widespread contaminant in water and soil due to its stability and potential links to liver, thyroid, and immune system issues.