Used primarily as a chlorinating and phosphorylating agent in organic synthesis. It facilitates the conversion of alcohols into alkyl chlorides and is instrumental in producing phosphoric acid esters. Widely employed in the pharmaceutical industry for synthesizing active pharmaceutical ingredients (APIs) and intermediates. Also utilized in the production of flame retardants and plasticizers due to its ability to introduce phosphate groups into organic molecules. In polymer chemistry, it serves as a key reagent for modifying polymers to enhance their properties. Additionally, it plays a role in the preparation of agrochemicals, such as pesticides and herbicides.