Ammonium phosphomolybdate

Ammonium phosphomolybdate is the inorganic salt of phosphomolybdic acid with the chemical formula (NH₄)₃PMo₁₂O₄₀. It contains the phosphomolybdate ion complex.

Ammonium phosphomolybdate[1]

Names
Other names Ammonium molybdophosphate Triammonium 12-molybdophosphate
Identifiers
CAS Number	12026-66-3 54723-94-3 (hydrate)
3D model (JSmol)	Interactive image
ChemSpider	21241450
ECHA InfoCard	100.031.545
EC Number	234-714-0
PubChem CID	90479084
UNII	F7YCY6MSAO
InChI InChI=1S/12Mo.3H3N.H3O4P.36O/c;;;;;;;;;;;;;;;1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h;;;;;;;;;;;;3*1H3;(H3,1,2,3,4);;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Key: RIAJLMJRHLGNMZ-UHFFFAOYSA-N
SMILES [NH4+].[NH4+].[NH4+].[O-]P(=O)([O-])[O-].O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O
Properties
Chemical formula	(NH4)3PMo12O40
Molar mass	1876.35 g/mol
Appearance	Yellow crystals
Melting point	Decomposes
Hazards
GHS pictograms
GHS Signal word	Warning
GHS hazard statements	H315, H319, H335[2]
GHS precautionary statements	P261, P305+351+338[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
verify (what is  ?)
Infobox references

The phosphomolybdate ion, [PMo₁₂O₄₀]³⁻.

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.

12(NH₄)₂MoO₄ + H₃PO₄ + 21 HNO₃ → (NH₄)₃PMo₁₂O₄₀↓ + 21 NH₄NO₃ + 12 H₂O

References

1. ChemicalBook: http://www.chemicalbook.com/ChemicalProductProperty_EN_CB6162083.htm
2. "Ammonium phosphomolybdate hydrate".