Used as a key intermediate in the synthesis of organic light-emitting diodes (OLEDs), particularly in electron-transport and host materials for blue phosphorescent devices. Its bromine groups allow for further functionalization via cross-coupling reactions, enabling precise tuning of electronic properties. Also employed in the development of flame retardants due to the phosphine oxide moiety, which enhances thermal stability and reduces flammability in polymer systems. Additionally, serves as a ligand or building block in catalytic systems and metal-organic frameworks where controlled polarity and steric bulk are required.