| Names | |
|---|---|
| IUPAC name Diammonium malate | |
| Other names Ammonium hydroxybutanedioate; E349 | |
| Identifiers | |
| CAS Number | |
| ChemSpider | |
| ECHA InfoCard | 100.025.909 
|
| EC Number |
|
| E number | E349 (antioxidants, ...) |
| PubChem CID | |
| UNII | |
| CompTox Dashboard (EPA) | |
| Properties | |
| Chemical formula | C4H9NO5 |
| Molar mass | 151.118 g·mol |
| Appearance | white solid |
| Density | 1.498 g/cm (monohydrate) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
 N verify (what is ?)
Infobox references
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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.
As a food additive, diammonium malate has been used as flavoring agent and as an acidity regulator. It has the E number E349.
References
- 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.
- ^ "Class Names and the International Numbering System for Food Additive" (PDF). Food and Agriculture Organization of the United Nations.
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