Amantanium bromide is primarily used in the field of organic synthesis as a phase-transfer catalyst. It facilitates the transfer of reactants between immiscible phases, enhancing reaction rates and yields in various chemical processes. This compound is particularly valuable in the synthesis of complex organic molecules, including pharmaceuticals and agrochemicals, where it helps in the efficient formation of carbon-carbon and carbon-heteroatom bonds. Additionally, it finds application in the preparation of specialty chemicals and polymers, where its catalytic properties contribute to the development of high-performance materials. Its role in improving the efficiency of chemical reactions makes it a useful tool in industrial and research settings.