Primarily used as a phase transfer catalyst in organic synthesis, it facilitates the transfer of reactants between immiscible phases, enhancing reaction rates and yields. It is particularly effective in nucleophilic substitution reactions, esterifications, and polymerizations. In addition, it serves as an electrolyte in electrochemical applications, such as in capacitors and batteries, due to its ionic conductivity. It is also employed in the preparation of ionic liquids and as a stabilizer in the production of certain polymers. Its role in analytical chemistry includes use as a reagent for ion-pair chromatography, aiding in the separation and detection of various compounds.