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Methylarsonic acid
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<p>Methylarsonic acid is an <a href="/facts/Organoarsenic_compound/BW425S1q">organoarsenic compound</a> with the formula CH3AsO3H2. It is a colorless, water-soluble solid. Salts of this compound, e.g. <a href="/facts/Disodium_methyl_arsonate/58VEXYqK">disodium methyl arsonate</a>, have been widely used in as herbicides and fungicides in growing cotton and rice. </p>