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Learn about the Human Health Toxicity Assessment for PFBS

In April 2021, EPA announced the release of the final Human Health Toxicity Values for Perfluorobutane Sulfonic Acid (CASRN 375-73-5) and Related Compound Potassium Perfluorobutane Sulfonate (CASRN 29420-49-3). Perfluorobutane sulfonic acid (PFBS) is a member of a larger group of per- and polyfluoroalkyl substances (PFAS). The toxicity assessment is a written summary of the potential health effects associated with PFBS and identifies the dose levels at which those health effects may occur in order to calculate toxicity values.

Communication Materials

Toxicity Assessments

Draft Reports & Supporting Materials