This chemical is primarily utilized as a ligand in catalytic processes, particularly in transition metal catalysis. It plays a significant role in facilitating various organic transformations, including cross-coupling reactions, hydrogenation, and hydroformylation. Its unique structure, combining a phosphine group with a sulfonic acid moiety, enhances its ability to stabilize metal complexes and improve catalytic efficiency. Additionally, it is employed in the synthesis of fine chemicals and pharmaceuticals, where precise control over reaction pathways is crucial. Its water-soluble nature, due to the sulfonic acid group, makes it advantageous in aqueous-phase catalytic systems, expanding its applicability in environmentally friendly processes.