phosphorus oxychloride (molecular formula: POCl3), also known as phosphorus chloride, phosphorus oxychloride, chlorine oxidation of phosphorus, is an industrial chemical raw materials, a colorless transparent liquid. With a pungent odor. Intense fuming in moist air. The relative density of 1.67. Melting point of 1.25 ℃. Boiling point 105.1 ℃. Decomposition of the formation of phosphoric acid in water, ethanol and hydrogen chloride. Plenty of water is suddenly poured into the can react violently.