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[dahy-fos-jeen] /daɪˈfɒs dʒin/
noun, Chemistry.
a colorless liquid, C 2 Cl 4 O 2 , usually derived from methyl formate or methyl chloroformate by chlorination: a World War I poison gas now used chiefly in organic synthesis.
Origin of diphosgene
First recorded in 1920-25; di-1 + phosgene Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for diphosgene


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 & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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diphosgene in Medicine

diphosgene di·phos·gene (dī-fŏz'jēn')
A colorless liquid that is used in organic synthesis and whose vapor was used as a poison gas in World War I. Also called trichlormethyl chloroformate.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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