This compound is a chiral organophosphorus derivative with a fused diindeno[7,1-de:1',7'-fg][1,3,2]dioxaphosphocin core, substituted with bis(3,5-dichlorophenyl) groups and featuring a hydroxy-oxide functionality at the 5-position with (11aR) stereochemistry. As a specialty chemical, it is primarily employed as a ligand in asymmetric catalysis for organic synthesis, enabling high enantioselectivity in reactions such as cross-couplings, hydrogenations, and allylic alkylations used in pharmaceutical and agrochemical production. Its rigid structure enhances stability and performance in catalytic processes, contributing to efficient synthesis of complex molecules. In material science, it serves as an intermediate for developing phosphorus-containing polymers with improved thermal and chemical properties. While its biological interactions are under exploration, direct pharmaceutical applications like drug delivery systems remain speculative and research-oriented.