Maleic Anhydride is a chemical substance that has the formula C2H2(CO)2O. It is maleic acid anhydride. This is a white or colorless substance with an unpleasant smell. The chemical is made on an industrial scale for use in coatings and plastics. Maleic Anhydride is created from n-butane oxidation in the vapor phase. The entire procedure dehydrogenates the backbone and changes the methyl groups into carboxylates. The resilience of maleic anhydride, with its conjugated double-bond structure, is reflected in the process selectivity.