mustard gas

mustard gas, chemical compound used as a poison gas in World War I. The burning sensation it causes on contact with the skin is similar to that caused by oil from black mustard seeds. The compound is not a gas but a colorless, oily liquid with a somewhat sweet, agreeable odor; it boils at 217°C. A powerful vesicant, mustard gas causes severe blistering even in small quantities. Highly irritating to the eyes, it quickly causes conjunctivitis and blindness. If inhaled, it attacks the respiratory tract and lungs, causing pulmonary edema. Some effects of exposure to mustard gas are delayed up to 12 hr; death may result several days after exposure. Mustard gas was introduced by the Germans in warfare against the British at Ypres, Belgium, in July, 1917, and took a heavy toll of casualties. It is dispersed as an aerosol by a bursting shell. Chemically, mustard gas is a thioether, 2,2′-dichlorodiethyl sulfide, (ClCH2CH2)2S. It can be prepared by reacting ethylene with sulfur monochloride, S2Cl2, or by other methods. Its vesicant property is readily destroyed either by oxidation or by chlorination (e.g., with bleaching powder).

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

More on mustard gas from Fact Monster:

  • lewisite - lewisite lewisite , liquid chemical compound used as a poison gas. Like mustard gas and nitrogen ...
  • nitrogen mustard - nitrogen mustard nitrogen mustard, any of various poisonous compounds originally developed for ...
  • poison gas - poison gas poison gas, any of various gases sometimes used in warfare or riot control because of ...
  • chemical warfare - chemical warfare chemical warfare, employment in war of incendiaries, poison gases, and other ...
  • Encyclopedia: Organic Chemistry - Encyclopeadia articles concerning Organic Chemistry.

See more Encyclopedia articles on: Organic Chemistry