Properties

Chemical Name Carbonyl Chloride
Chemical Formula COCl2
Molar Mass 98.2
Melting Point -120.0ºC or -184ºF
Boiling Point 8.2ºC or 47ºF
Density in gaseous state 3.4


COCl2 is a colorless gas with an odor of fresh hay or grass. The most common chemical name for COCl2 is phosgene. However there are other chemical names, including: Carbonyl Chloride, carbonic dichloride, carbon oxychloride, carbonyl dichloride, chloroformyl chloride, d-stoff, and green cross.





file:///C:/Files/Rachel/Chemistry%20Web%20project/www.emedicine.com/EMERG/%20topic849.htm
This figure demonstrates how the atoms in the phosgene <molecule> bond together. All of the atoms in a phosgene molecule are held together by covalent bonds. As you can see the bond between carbon and oxygen in the molecule is a double bond while the bonds between the carbon atom and the two chlorine atoms are single <bonds. From> this figure the percent <composition> of phosgene by number is easy to tell. It is 25% carbon, 25% <oxygen, and> 50% chlorine. However a more accurate way to find the percent <composition> is by mass. The percent by mass of phosgene is 12% carbon, 16% <oxygen, and> 72% chlorine.



This is a 3-D model of a phosgene molecule.