Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between compounds in different phases, such as aqueous and organic. Enhances the efficiency of alkylation, acylation, and other nucleophilic substitution reactions. Applied in the production of specialty chemicals, pharmaceuticals, and agrochemicals. Its stability and solubility in various solvents make it suitable for high-temperature and high-pressure reactions. Also employed in polymerization processes to control molecular weight and distribution of polymers.