Ammonium phosphomolybdate

Ammonium phosphomolybdate ^[1]

Other names Ammonium molybdophosphate
Identifiers
CAS number	12026-66-3
ChemSpider	21170136^Y
Jmol-3D images	Image 1
SMILES O.O=[Mo](=O)(OP(=O)(O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo]([O-])(=O)=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo]([O-])(=O)=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo]([O-])(=O)=O.[NH4+].[NH4+].[NH4+]
InChI InChI=1S/12Mo.3H3N.H3O4P.H2O.36O/c;;;;;;;;;;;;;;;1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h;;;;;;;;;;;;31H3;(H3,1,2,3,4);1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/q;;;;;;;;;3+1;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3-1^Y Key: FPMGDWVRFQSMKO-UHFFFAOYSA-N^Y InChI=1/12Mo.3H3N.H3O4P.H2O.36O/c;;;;;;;;;;;;;;;1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h;;;;;;;;;;;;31H3;(H3,1,2,3,4);1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/q;;;;;;;;;3+1;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3-1/rMo12O40P.3H3N.H2O/c13-1(14,15)41-4(22,23)44-7(28,29)47-10(34,35)50-53(40,51-11(36,37)48-8(30,31)45-5(24,25)42-2(16,17)18)52-12(38,39)49-9(32,33)46-6(26,27)43-3(19,20)21;;;;/h;3*1H3;1H2/q-3;;;;/p+3 Key: FPMGDWVRFQSMKO-AHLDUZLPAZ
Properties
Molecular formula	(NH₄)₃PMo₁₂O₄₀
Molar mass	1876.35 g/mol
Appearance	Yellow crystals
Melting point	Decomposes
Hazards
EU classification	Oxidizer (O), Corrosive (C)
R-phrases	R36/37/38^[2]
S-phrases	S26, S36/37, S60^[3]
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

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

Synthesis

Ammonium phosphomolybdate can be made by heating ammonium molybdate combined with phosphoric acid and nitric acid, yielding ammonium nitrate, water, and ammonium phosphomolybdate precipitate.

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