Perfluorobutane sulfonamide

Chemical compound

Perfluorobutane sulfonamide, also known as FBSA or H-FBSA, is a perfluorinated surfactant. FBSA and its N-alkylated derivatives have been patented by 3M for use in acid etch solutions with low surface tension. According to the inventors, FBSA and its derivatives are expected to have a smaller tendency to accumulate in living organisms than their perfluorooctanyl analogs such as PFOS. Nevertheless, a 2015 study found FBSA in 32 out of 33 samples of Canadian fish.

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