Nonafluorobutane-1-sulfonate potassium salt (PFBS-K) is a perfluorinated compound widely used as a surfactant and in industrial applications, including firefighting foams, coatings, and electronics manufacturing. It is a stable and water-soluble compound, offering thermal and chemical resistance. As a short-chain perfluoroalkyl substance (PFAS), it has lower bioaccumulation potential compared to long-chain PFAS like PFOA and PFOS. However, environmental and health concerns exist due to its persistence and potential toxicity.