This chiral bis(diphenylphosphino)spirobiindene ligand is a specialty chemical primarily used in asymmetric catalysis within organic synthesis. It serves as a key ligand for transition-metal catalysts, such as palladium and rhodium complexes, enabling highly enantioselective reactions including C-C bond formations (e.g., Suzuki-Miyaura cross-couplings) and C-heteroatom couplings. Its rigid spirocyclic structure provides excellent steric control and stability, making it valuable in the pharmaceutical industry for synthesizing chiral drug intermediates, in agrochemical production for enantiopure pesticides, and in material science for creating functional organic molecules with high purity and minimal byproducts.