Bis(2-methylphenyl)phosphane is primarily used as a ligand in coordination chemistry, where it plays a crucial role in stabilizing metal complexes. Its application is significant in catalysis, particularly in processes like hydrogenation, hydroformylation, and cross-coupling reactions, where it enhances the efficiency and selectivity of the catalytic systems. Additionally, it is employed in the synthesis of organophosphorus compounds, which are valuable in various industrial and research applications. The compound's ability to form stable complexes with transition metals also makes it useful in the development of new materials and in the study of reaction mechanisms.