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
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.545
EC Number
  • 234-714-0
UNII
  • InChI=1S/12Mo.3H3N.H3O4P.36O/c;;;;;;;;;;;;;;;1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h;;;;;;;;;;;;3*1H3;(H3,1,2,3,4);;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Y
    Key: RIAJLMJRHLGNMZ-UHFFFAOYSA-N Y
  • [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
(NH4)3PMo12O40
Molar mass 1876.35 g/mol
Appearance Yellow crystals
Melting point Decomposes
Hazards
GHS labelling:
Warning
H315, H319, H335[2]
P261, P305+P351+P338[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
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".
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