Dimagnesium phosphate
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| Density | 2.13 g/cm3 trihydrate |
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Dimagnesium phosphate is a compound with formula MgHPO4. It is a Mg2+ salt of monohydrogen phosphate. The trihydrate is well known, occurring as the mineral newberyite.[1]
It can be formed by reaction of stoichiometric quantities of magnesium oxide with phosphoric acid.
- MgO + H3PO4 → MgHPO4 + H2O
Dissolving monomagnesium phosphate in water, forms phosphoric acid and depositing a solid precipitate of dimagnesium phosphate trihydrate:
- Mg(H2PO4)2 + 3 H2O → Mg(HPO4).3H2O + H3PO4
The compound is used as a nutritional supplement, especially for infants and athletes. Its E number is E343.[2]
See also
References
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- ↑ Relevant part of the German “Zusatzstoff-Zulassungsverordnung Script error: No such module "webarchive".”, the official German implementation of the respective regulation of the European Union
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