Used primarily in the production of fluorine gas through electrolysis, where it serves as an electrolyte due to its high ionic conductivity and thermal stability. Also employed in metal cleaning and surface treatment processes, especially for removing oxides from aluminum and stainless steel, and as a flux in welding and brazing. Commonly used in the synthesis of fluorinated organic and inorganic compounds, including pharmaceuticals and agrochemicals. Applied in glass etching and semiconductor manufacturing for precise material removal. Its ability to dissolve silica and silicates makes it useful in analytical chemistry for sample preparation.