|Also called: phenarsazine chloride a yellow poisonous crystalline solid that readily sublimes; diphenylaminechlorarsine. It is used in chemical warfare as a vomiting agent. Formula: C6H4AsClNHC6H4; relative density: 1.65; melting pt: 195°C; boiling pt: 410°C|
|[C20: named after Roger Adams (1899--1971), American chemist]|
in chemical warfare, sneeze gas developed by the United States and used during World War I. Adamsite is an arsenical diphenylaminechlorarsine and an odourless crystalline organic compound employed in vaporous form as a lung irritant. It appears as a yellow smoke that irritates eyes, lungs, and mucous membranes and causes sneezing, vomiting, and acute discomfort in the nose, throat, and chest. Eventually severe nausea develops, with headache, general physical weakness, and despondency. The effect usually lasts about 12 hours. The only protection against inhaling the gas is a good mechanical filter
Learn more about adamsite with a free trial on Britannica.com.