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, oxidations, and esterifications where it enhances reaction rates and yields. Also employed in the preparation of fine chemicals, pharmaceuticals, and agrochemicals due to its ability to improve selectivity and efficiency. Soluble in both aqueous and organic media, making it suitable for biphasic systems. Additionally used in electrochemistry as a supporting electrolyte and in analytical chemistry for ion-pairing applications.