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Ammonium phosphomolybdate

Triammonium 12-molybdophosphate | NFPA-H = | NFPA-F = | NFPA-R = | NFPA-S =

Ammonium phosphomolybdate is the inorganic salt of phosphomolybdic acid with the chemical formula (NH4)3PMo12O40. The salt contains the phosphomolybdate anion, a well known heteropolymetalate of the Keggin structural class.

Synthesis

Ammonium phosphomolybdate can be made by heating ammonium orthomolybdate combined with phosphoric acid and nitric acid, yielding ammonium nitrate, water, and a yellow precipitate of ammonium phosphomolybdate is obtained. :

Normally, it often exists as a hexahydrate, a dark yellow fine crystal which is poorly soluble in water.

It is also obtained as a test result for phosphate ions.

References

References

  1. ChemicalBook: http://www.chemicalbook.com/ChemicalProductProperty_EN_CB6162083.htm
  2. "Ammonium phosphomolybdate hydrate".
  3. (2014). "Inorganic Syntheses: Volume 36".
  4. (2000). "Ullmann's Encyclopedia of Industrial Chemistry".
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ammonium-compounds molybdates inorganic-phosphorus-compounds heteropoly-acids
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