Used as a phase transfer catalyst in organic synthesis, facilitating reactions between compounds in different phases, such as aqueous and organic layers. It is particularly effective in nucleophilic substitution reactions, esterifications, and polymerizations. Also employed in the preparation of ionic liquids, which are utilized in green chemistry for their low volatility and high thermal stability. Additionally, it finds application in the pharmaceutical industry for the synthesis of active pharmaceutical ingredients (APIs) and in material science for modifying surface properties of polymers and nanoparticles.