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EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HYDROGEN COMPOUNDS > HYDROXYL

Definition:
Hydroxyl (OH) - an atom consisting of one hydrogen atom and one oxygen
atom which does not normally exist in a stable form; this radical readily
reacts with methane and carbon monoxide. The source of the hydroxyl
radical in the atmosphere occurs primarily through the 1) photolysis of
hydrogen peroxide, heat, and light and 2) the attack on water of an
excited oxygen radical (created by the photolysis of ozone). [JAPCA; v39;
704; 1989] [Journal of Chemical Society; v85; 577; 1989.]


Reference:
Atmospheric and Air Chemistry Glossary from the Sam Houston State University.
http://www.shsu.edu/~chemistry/Glossary/glos.html