Phosphoryl chloride (commonly called phosphorus oxychloride) is a colourless liquid with the formula {Phosphorus}{Oxygen}{Chlorine}3. With the freezing point of 1 °C and boiling point 106 °C, the liquid range is very similar to water. It hydrolyses in moist air releasing phosphoric acid and choking fumes of hydrogen chloride. It is manufactured ... Found on http://en.wikipedia.org/wiki/Phosphoryl_chloride