1-Bromopentadecane is primarily used in organic synthesis as a building block for the creation of more complex chemical compounds. It serves as an alkylating agent, introducing the pentadecyl group into various molecules, which is useful in the development of surfactants, lubricants, and other specialty chemicals. In research, it is employed in the synthesis of long-chain fatty acid derivatives and other organic intermediates. Additionally, it finds application in the production of quaternary ammonium compounds, which are widely used in fabric softeners, disinfectants, and phase transfer catalysts. Its role in modifying surface properties makes it valuable in materials science and nanotechnology.