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]
| Names | |
|---|---|
| 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).
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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]
References
edit- ^ Anandha Babu, G.; Bhagavannarayana, G.; Ramasamy, P. (2008). "Synthesis, crystal growth, structural, optical, thermal and mechanical properties of novel organic NLO material: Ammonium malate". Journal of Crystal Growth. 310 (6): 1228–1238. Bibcode:2008JCrGr.310.1228A. doi:10.1016/j.jcrysgro.2007.12.024.
- ^ a b "Class Names and the International Numbering System for Food Additive" (PDF). Food and Agriculture Organization of the United Nations.
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