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Maleic acid or cis-butenedioic acid is an organic compound that is a dicarboxylic acid, a molecule with two carboxyl groups. Its chemical formula is HO2CCHCHCO2H.
M 1345 (OTTO) Maleic acid, 99% Cas 110-16-7 - used as a precursor to fumaric acid, and relative to its parent maleic anhydride.