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Meaning of diphosgene

di•phos•gene

Pronunciation: (dī-fos'jēn), [key]
— n. Chem.
  1. a colorless liquid, CClO, usually derived from methyl formate or methyl chloroformate by chlorination: a World War I poison gas now used chiefly in organic synthesis. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.