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 substitution reactions, especially for alkylation processes. Also serves as a precursor in the preparation of quaternary ammonium-based ionic liquids, which are employed in electrochemistry and catalysis. Its cyanomethyl group allows further functionalization, making it useful in the synthesis of pharmaceutical intermediates and specialty chemicals.