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<a accesskey="3" href="page.php?w=Organophosphorus_chemistry&amp;p=2">3.Next</a>
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<p><b>Organophosphorus chemistry</b> is the scientific study of the synthesis and properties of <b>organophosphorus compounds</b>, which are <a href="page.php?w=organic_compound">organic compound</a>s containing <a href="page.php?w=phosphorus">phosphorus</a>. They are used primarily in <a href="page.php?w=pest_control">pest control</a> as an alternative to <a href="page.php?w=chlorinated_hydrocarbons">chlorinated hydrocarbons</a> that persist in the environment. Some organophosphorus compounds are highly effective <a href="page.php?w=insecticide">insecticide</a>s,</p><p>
<a accesskey="3" href="page.php?w=Organophosphorus_chemistry&amp;p=2">3.Next</a>
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