Malic acid is an organic compound with the molecular formula C4H6O5. It is a dicarboxylic acid that is made by all living organisms, contributes to the pleasantly sour taste of fruits,
D 1377 (OTTO) DL-Malic acid, for biochemistry, 99%+ Cas 617-48-1 - used with or in place of the less sour citric acid in sour sweets.