Chlorodiphenylphosphine is widely used as a key intermediate in the synthesis of various organophosphorus compounds. It plays a crucial role in the production of ligands for catalysis, particularly in transition metal-catalyzed reactions, which are essential in pharmaceutical and fine chemical manufacturing. Additionally, it is utilized in the preparation of flame retardants, where it contributes to enhancing the fire resistance of materials such as plastics and textiles. Its applications also extend to the field of agrochemicals, where it is involved in the synthesis of pesticides and herbicides. Furthermore, chlorodiphenylphosphine is employed in the development of organic light-emitting diodes (OLEDs) and other advanced materials due to its ability to modify electronic properties.