Used as a ligand in transition metal catalysis, particularly in cross-coupling reactions such as Suzuki-Miyaura and Heck reactions, enhancing the efficiency and selectivity of these processes. It is also employed in the synthesis of complex organic molecules, including pharmaceuticals and fine chemicals, due to its ability to stabilize metal centers and facilitate bond formation. Additionally, it finds application in the development of new materials, such as polymers and coordination complexes, where its phosphine and aldehyde functionalities enable versatile reactivity and structural design.