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diphosgene (dĪˌfŏzˈjēn) [key], colorless liquid developed as a military poison. It boils at 128°C; its vapors have the odor of phosgene. Diphosgene is a lung irritant but is only slightly lachrimatory. Like phosgene, its effects are often delayed. Chemically it is trichloromethylchloroformate, ClCO2CCl3.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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