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.
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Other names
Ammonium molybdophosphate
Triammonium 12-molybdophosphate | |
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ECHA InfoCard | 100.031.545 |
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Properties | |
(NH4)3PMo12O40 | |
Molar mass | 1876.35 g/mol |
Appearance | Yellow crystals |
Melting point | Decomposes |
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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).
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Infobox references
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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.[3]
Normally, it often is as a hexahydrate, which is a dark yellow fine crystal, and poorly soluble in water.[3]