Used in organic synthesis as a phase-transfer catalyst, facilitating reactions between compounds in different phases, and as a precursor in the Wittig reaction for forming carbon-carbon double bonds. Commonly applied in the preparation of pharmaceuticals and fine chemicals. Enhances the efficiency of alkylation and acylation reactions. Also employed in the synthesis of ionic liquids, which are used in various industrial processes. Plays a role in the development of materials with specific electronic properties. Utilized in research for studying reaction mechanisms and kinetics.