| acetic acid |
Second of the series of organic (carboxylic) acids, formula CH 3 COOH, systematic name ethanoic acid. Acetic acid is thought to be formed in the atmosphere from the oxidation of acetaldehyde, although the exact details of the transformation are unknown. It contributes to the acidity of rainfall in remote (unpolluted) areas.
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| acetone |
Simplest ketone molecule, formula CH 3 COCH 3 , formed in the oxidation of propane and several larger hydrocarbons; used widely as an organic solvent, due to its high miscibility with water. Its photolysis is believed to be an important source of odd hydrogen radicals in the troposphere above the boundary layer.
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| acetonitrile |
Chemical also known as methyl cyanide, formula CH 3 CN. It is emitted from incomplete combustion of vegetable matter, notably biomass, for example, cigarettes. Acetonitrile is relatively unreactive in the troposphere and thus reaches the stratosphere, where it participates in ion
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| acetylene |
Unsaturated hydrocarbon, formula C 2 H 2 , systematic name ethyne; member of the alkyne family; major component of incomplete combustion.
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| acetaldehyde |
Aldehyde, formula CH 3 CHO, formed in the oxidation of ethane and other organic compounds. It is a major precursor to the pollutant, peroxyacetyl nitrate (PAN).
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