Used as a catalyst in organic synthesis, particularly in alkylation and acylation reactions. Employed in the preparation of diazonium tetrafluoroborates, which are stable intermediates in dye and pigment manufacturing. Commonly utilized in electroplating baths to improve metal deposition efficiency and surface finish. Serves as a reagent in the synthesis of ionic liquids and in protonation processes where a non-coordinating anion is required. Also applied in analytical chemistry for the separation and determination of certain metal ions.