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phosgene molecule
Phosgene, also called carbonyl chloride (COCl2), is a colorless, reactive gas, hydrolyzed by water, made by catalytic combination of carbon monoxide and chlorine, and used to make resins and dyes. Highly toxic, it was used as a poison gas in World War I. Boiling point 8.2°C (46.8°F), melting point -118°C (-180.5°F).

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