phosgene

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phosgene

 [fos´jēn]
a suffocating and highly poisonous war gas, carbonyl chloride, COCl2.

phos·gene (CG),

(fos'jēn),
Carbonyl chloride; a colorless liquid below 8.2°C, but an extremely poisonous gas at ordinary temperatures; it is an insidious gas, given that it is not immediately irritating, even when fatal concentrations are inhaled; more than 80% of World War I's chemical agent fatalities were caused by phosgene.

phos·gene

(fos'jēn)
Carbonic dichloride, COCl2; a colorless liquid at temperatures below 8.2°C, but an extremely poisonous gas at ordinary temperatures; more than 80% of World War I's chemical-agent fatalities were caused by this gas (NATO Code GG).