Dimagnesium phosphate is a compound with formula MgHPO4. It is a Mg2+ salt of monohydrogen phosphate. The trihydrate is well known, occurring as a mineral. It can be formed by reaction of stoichiometric quantities of magnesium oxide with phosphoric acid. ... Mg(H2PO4)2 + 3 H2O → Mg(HPO4)3H2O + H3PO.
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.3H₂O, dimagnesium phosphate.
Magnesium phosphate is a general term for salts of magnesium and phosphate appearing in several forms and several hydrates