Maleic acid is a dicarboxylic acid used industrially rather than in perfumery; in isolation it has a very faint, sharp, sour-acidic character with little aromatic interest. It is not a fragrance raw material in any conventional sense.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 776.
White crystals
Very soluble in water and alcohol, poorly soluble in most oils
Faintly caramellic odor
Acid-astringent taste and mouthfeel, not exactly pleasant
Concentrations up to 100 ppm of this acid are used in fats and oils intended for food use
1) by heating of Malic acid. 2) from Benzene by vapor phase oxidation in presence of a Vanadium catalyst. 3) as a by-product in the preparation of Phthalic anhydride is obtained Maleic anhydride, which is transformed into the acid.