Used primarily as an intermediate in the production of flame retardants due to its ability to form phosphorus-nitrogen ring structures that exhibit thermal stability and fire resistance. It serves as a building block for synthesizing specialty polymers, including elastomers and heat-resistant coatings. Its reactivity allows substitution of chlorine atoms with various organic groups, enabling customization for use in lubricants, sealants, and adhesives requiring high thermal and chemical resistance. Also employed in the development of corrosion inhibitors and reactive agents in organic synthesis.