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<p>a <a href="page.php?w=unsaturated_fat">monounsaturated</a>, 18-carbon <a href="page.php?w=fatty_acid">fatty acid</a>. Among fatty acids, ricinoleic acid is unusual in that it has a <a href="page.php?w=hydroxyl">hydroxyl</a> <a href="page.php?w=functional_group">functional group</a> on the 12th carbon atom. This functional group causes ricinoleic acid (and castor oil) to be more <a href="page.php?w=chemical_polarity">polar</a> than most fats. The chemical reactivity of the alcohol group also allows chemical <a href="page.php?w=derivatization">derivatization</a></p><p>
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