Monomagnesium phosphate
Appearance
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Names | |
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Other names
Monomagnesium orthophosphate;
Magnesium dihydrogen phosphate; Magnesium phosphate monobasic; Magnesium biphosphate; Acid magnesium phosphate | |
Identifiers | |
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3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.032.716 |
E number | E343(i) (antioxidants, ...) |
PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
H4MgO8P2 | |
Molar mass | 218.277 g·mol−1 |
Appearance | White, odorless, crystalline powder |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Monomagnesium phosphate is one of the forms of magnesium phosphate. It is a magnesium acid salt of phosphoric acid with the chemical formula Mg(H2PO4)2. Di- and tetrahydrates are known also. It dissolves in water, forming phosphoric acid and depositing a solid precipitate of Mg(HPO4).3H2O, dimagnesium phosphate.[2]
As a food additive, it is used as an acidity regulator and has the E number E343.
References
- ^ Monomagnesium phosphate, FAO JECFA Monographs 5 (2008)
- ^ Klaus Schrödter; Gerhard Bettermann; Thomas Staffel; Friedrich Wahl; Thomas Klein; Thomas Hofmann (2008). Phosphoric Acid and Phosphates. Ullmann’s Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a19_465.pub3.