Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between reagents in different phases by transferring ions into organic solvents. Commonly applied in nucleophilic substitutions, esterifications, and oxidation reactions where it enhances reaction rates and yields. Also utilized in electrochemistry as a supporting electrolyte due to its good solubility in polar solvents and stability over a wide potential range. Additionally, it serves in analytical chemistry for ion-pair chromatography and sensor applications.