Used as a ligand in homogeneous catalysis, particularly in transition metal-catalyzed reactions such as hydrogenation, hydroformylation, and cross-coupling reactions. Its phosphine group coordinates effectively with metals like palladium, rhodium, and ruthenium, enhancing catalytic activity and selectivity. The carboxylic acid functionality allows for easy modification or anchoring to supports, enabling applications in immobilized catalytic systems. Also employed in the synthesis of functionalized organometallic complexes for use in fine chemical and pharmaceutical production.