diphosgene

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di·phos·gene

 (dī-fŏz′jēn′)
n.
A colorless liquid, C2Cl4O2, used in organic synthesis. Its vapor was used as a poison gas in World War I.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

diphosgene

(daɪˈfɒzdʒiːn)
n
(Elements & Compounds) an oily liquid with an extremely poisonous vapour, made by treating methanol with phosgene and chlorinating the product: has been used in chemical warfare. Formula: ClCOOCCl3
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

di•phos•gene

(daɪˈfɒs dʒin)

n.
a colorless liquid, C2Cl4O2, used during World War I as a poison gas.
[1920–25]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive
Of 91,000 deaths attributed to gas, 85 per cent were due to inhalation of phosgene or a similar agent, diphosgene.
Praise for gas mask guinea pigs
Classification of chemical weapons (15) Nerve Gases Blister Gases Pulmonary Blood Irritants Poisons Sarin (GB) Sulfur Mustard Phosgene (CG) Cyanogen (HD) Chloride Tabun (GA) Nitrogen Diphosgene (DP) Hydrogen Mustard Cyanide (HN-mustard gases) Soman (GD) Lewisite (L) Chlorine (CL) Methylphosphono- Phosgene oxime Chloropicrin thioic acid (VX) (CX) (PS) Nerve Gases Incapacitators Vomitive Agents Sarin (GB) Psychomimetics Adamsite (DM) (3- quinuclidinyl benzilate, LSD) Tabun (GA) Opioids and Diphenylcyanoarsine Benzodiazepines (DC) Soman (GD) Tear Gases Diphenylchloroarsine Chloroacetophenone (DA) (CN), orthochloroben- zylidenemalononitrile (CS), Methylphosphono- Dibenzo [B,F] [1,4] thioic acid (VX) Oxazepine) (CR)
Emergency and first aid in cases of the use of chemical, biological, radiation, and nuclear weapons
Choking agents Chlorine Chloropicrin Phosgene Diphosgene
Biological, chemical and radiological terrorism
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