Phosgene dates back over 200 years to its conception in the laboratory of Cornish chemist John Davy. During WWI, it was known as 'Choky Gas' or 'CG.' Today it remains ubiquitous in the industrial landscape. Phosgene is a hydrophobic, volatile irritant that causes chemical pneumonitis and is a cause of acute respiratory distress syndrome (ARDS) that can be refractory.
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