Used as a key intermediate in the synthesis of agrochemicals and pharmaceuticals, particularly in reactions involving phosphorus-based ligands or catalysts. Its amine and phosphine oxide functional groups allow for dual reactivity, making it valuable in the development of novel compounds for crop protection agents and in medicinal chemistry for kinase inhibitor design. Also employed in materials science for creating flame retardants due to the phosphorus content, which enhances thermal stability and reduces flammability in polymers.