Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between reagents in different phases by transferring ions into organic solvents. Commonly employed in esterification, ether formation, and deprotonation of weak acids due to its strong basicity and solubility in non-aqueous media. Also utilized in analytical chemistry for titrations and as a reagent in the preparation of other quaternary ammonium compounds. Its solution form makes it convenient for precise dosing in industrial and laboratory settings.