Phosphorus oxychloride is a chemical compound with the formula POCl3. It is a colorless, oily liquid that is used primarily as a reagent in organic synthesis and as a chlorinating agent. The compound is known for its ability to convert alcohols into chlorides, making it valuable in the production of various chemicals. In addition to its use in organic chemistry, phosphorus oxychloride is also employed in the manufacture of phosphoric acid and as a solvent in some industrial processes. Due to its reactive nature, it must be handled with care, as it can cause irritation to the skin and eyes.