Used primarily as a phase-transfer catalyst in organic synthesis, it facilitates the transfer of reactants between organic and aqueous phases, enhancing reaction efficiency. It is particularly effective in nucleophilic substitution reactions, where it helps in the formation of carbon-halogen bonds. Additionally, it finds application in the synthesis of pharmaceuticals and fine chemicals, where precise control over reaction conditions is crucial. Its ability to stabilize intermediates and improve yields makes it valuable in complex multi-step synthesis processes.