Used as a phase-transfer catalyst in organic synthesis, facilitating reactions between compounds in different phases. It is particularly effective in nucleophilic substitution reactions, where it helps transfer anions from the aqueous phase to the organic phase. This chemical is also employed in the preparation of ionic liquids, which are used as solvents in various chemical processes. Additionally, it serves as a reagent in the synthesis of complex organic molecules, including pharmaceuticals and agrochemicals. Its ability to stabilize reactive intermediates makes it valuable in polymerization reactions and the production of specialty polymers.