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Sodium orthovanadate

Sodium orthovanadate is the inorganic compound with the chemical formula Na3VO4. It forms a dihydrate Na3VO4·2H2O. Sodium orthovanadate is a salt of the VO3−4 oxyanion. It is a colorless, water-soluble solid.

Synthesis and structure
Sodium orthovanadate is produced by dissolving vanadium(V) oxide in a solution of sodium hydroxide: : The salt features tetrahedral anion centers linked to octahedral cation sites. ==Condensation equilibria==
Condensation equilibria
Like many oxometalates, orthovanadate is subject to a number of reactions, which have been analyzed by 51V NMR studies. At high pH, ions exist in equilibrium with . At lower pH's, condensation ensues to give various polyoxovanadates. Ultimately, decavanadate is formed. ==Biochemistry==
Biochemistry
Vanadates exhibit a variety of biological activities, in part because they serve as structural mimics of phosphates. It acts as a competitive inhibitor of ATPases, alkaline and acid phosphatases, and protein-phosphotyrosine phosphatases, Orthovanadate is activated by boiling and adjusting pH to ~10; this depolymerizes decavanadate into the active inhibitor, monovanadate. ==References==
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