Used in organic synthesis as a building block for creating more complex molecules, particularly in the development of pharmaceuticals and agrochemicals. It serves as a ligand in coordination chemistry, aiding in the formation of metal complexes for catalytic applications. Additionally, it is employed in material science for modifying surfaces to enhance properties like corrosion resistance or adhesion. Its phosphonic acid group makes it useful in creating self-assembled monolayers on metal oxides, which are important in nanotechnology and sensor development.