PHOSPHORUS OXYCHLORIDE LR
Phosphoryl chloride (commonly called phosphorus oxychloride) is a colourless liquid with the formula POCl3. It hydrolyses in moist air releasing phosphoric acid and fumes of hydrogen chloride. It is manufactured industrially on a large scale from phosphorus trichloride and oxygen or phosphorus pentoxide.
Phosphorus Oxychloride is a colorless to pale yellow, fuming, oily liquid with a strong odor. It is used as a chlorinating agent, and in making semiconductors, gasoline additives, plasticizers, hydraulic fluids, and organophosphorus compounds such as pesticides.
Phosphorous acid, H3PO3, is the acid that forms when P4O6 reacts with water. For preparing a small amount of the acid in a laboratory, it is more convenient to carefully hydrolyze PCl3.