TPPB is widely used as a phase transfer catalyst in organic synthesis. It facilitates the transfer of reactants between immiscible phases, such as aqueous and organic layers, enhancing reaction efficiency. This compound is particularly valuable in nucleophilic substitution reactions, where it helps in the smooth transfer of anions from the aqueous phase to the organic phase. Additionally, TPPB is employed in the synthesis of pharmaceuticals, agrochemicals, and fine chemicals, where precise control over reaction conditions is crucial. Its ability to stabilize reactive intermediates also makes it useful in polymerization processes and the production of specialty polymers.