Names | |
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IUPAC name
Diammonium malate
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Other names
Ammonium hydroxybutanedioate; E349
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Identifiers | |
ChemSpider | |
ECHA InfoCard | 100.025.909 |
EC Number |
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E number | E349 (antioxidants, ...) |
PubChem
CID
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UNII | |
CompTox Dashboard (
EPA)
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Properties | |
C4H9NO5 | |
Molar mass | 151.118 g·mol−1 |
Appearance | white solid |
Density | 1.498 g/cm3 (monohydrate) |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Ammonium malate refers to organic compounds containing malate and ammonium. Two stoichiometries are discussed: NH4H(C2H3OH(CO2)2) with one ammonium ion per formula unit, and (NH4)2(C2H3OH(CO2)2). Malate, the conjugate base of malic acid, is chiral. Consequently a variety of salts are possible, R vs S vs racemic. The monoammonium salt has been crystallized as the monohydrate. [1]
As a food additive, diammonium malate has been used as flavoring agent and as an acidity regulator. [2] It has the E number E349. [2]