Benzyldiphenylphosphine is widely used as a ligand in coordination chemistry and catalysis. It plays a crucial role in transition metal-catalyzed reactions, particularly in cross-coupling reactions like Suzuki and Heck couplings, where it enhances the efficiency and selectivity of the process. Additionally, it is employed in the synthesis of organophosphorus compounds, which are valuable intermediates in the production of pharmaceuticals, agrochemicals, and fine chemicals. Its ability to stabilize metal complexes also makes it useful in the development of homogeneous catalysts for organic transformations.