Monomagnesium phosphate

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Monomagnesium phosphate[1]
Magnesium phosphate monobasic.png
CAS number 13092-66-5 YesY, (Anhydrous)
15609-87-7 (Dihydrate)
Molecular formula H4MgO8P2
Molar mass 218.28 g mol−1
Appearance White, odorless, crystalline powder
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY (verify) (what is: YesY/N?)
Infobox references

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.

As a food additive, it is used as an acidity regulator and has the E number E343.


  1. ^ Monomagnesium phosphate, FAO JECFA Monographs 5 (2008)