Malic acid (2-hydroxybutanedioic acid, E296) is a naturally occurring dicarboxylic hydroxy acid found in apples, cherries, grapes, gooseberries, and many other fruits. The L-isomer is the form present in nature; commercial material is usually the racemic DL mixture obtained by chemical synthesis or fermentation routes.
Sensory and functional profile
Malic acid delivers a clean, relatively long-lasting tartness that many flavorists prefer over citric acid for certain fruit profiles. It is highly water-soluble, essentially odorless, and available as a white crystalline powder. In addition to its sensory contribution it functions as:
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An acidity regulator
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A mild preservative that supports microbial stability
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A color-retention aid in fruit preparations
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A chelating agent in selected technical systems
Industrial uses
In food and beverage applications malic acid is used in soft drinks, candies, jams, fruit fillings, wine, and confectionery where a prolonged sour note is desired. It frequently serves as a partial or complete replacement for citric acid. Personal-care formulators employ it as a mild alpha-hydroxy acid for exfoliation, pH adjustment, and skin-brightening effects in creams, toners, and hair-care products. The pharmaceutical and nutraceutical industries use it in digestive aids, mineral salts, and as an intermediate in organic synthesis. Technical grades find application in the manufacture of esters for cleaners and other specialty chemicals.
Practical formulation tips
The pure optical isomers melt near 100 °C; the racemate behaves similarly. Above approximately 140 °C under anaerobic conditions malic acid can dehydrate to fumaric or maleic acid, so process temperatures should be controlled accordingly. The acid is somewhat more hygroscopic than certain other food-grade organic acids, which affects powder handling and storage conditions.
In the U.S. market malic acid is a cost-effective, well-established option for product developers who want authentic fruit acidity without the sharper, shorter-lived bite sometimes associated with citric acid. Its combination of sensory and technical functionality makes it valuable across multiple categories.
Laboratory services 
