Ammonium heptamolybdate

Ammonium heptamolybdate
Names
IUPAC name
Ammonium docosaoxoheptamolybdate(6–)
Other names
Ammonium molybdate
Ammonium paramolybdate
(see text)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.553 Edit this at Wikidata
EC Number
  • 234-320-9
UNII
  • InChI=1S/7Mo.6H3N.24H2O/h;;;;;;;6*1H3;24*1H2 checkY
    Key: QGAVSDVURUSLQK-UHFFFAOYSA-N checkY
  • InChI=1/7Mo.6H3N.24H2O/h;;;;;;;6*1H3;24*1H2
    Key: QGAVSDVURUSLQK-UHFFFAOYAC
  • [NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[O-][Mo](=O)(=O)[O-].[O-][Mo](=O)(=O)[O-].[O-][Mo](=O)(=O)[O-]
  • [NH4+].[NH4+].[NH4+].[Mo]3479%12[O+]1[Mo]25([O-])([O-])O[Mo]1%10([O-])([O-])O[Mo]%11([O-])([O-])(O[Mo]8([O-])([O-])(O[Mo]6([O-])([O-])(O[Mo]([O-])([O-])(O2)(O3)[O++]456)[O+]78)[O++]9%10%11)O%12.[NH4+].[NH4+].[NH4+]
Properties
(NH4)6Mo7O24
Molar mass 1163.9 g/mol
1235.86 g/mol (tetrahydrate)
Appearance white solid
Density 2.498 g/cm3
Melting point ~90 ˚C (loses water molecule)
190 °C (decomp.)
65.3 g / 100 ml (tetrahydrate)
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Irritant
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
Flash point Non-flammable
Safety data sheet (SDS) External MSDS
Related compounds
Other anions
 Ammonium orthomolybdate
Ammonium dimolybdate
Other cations
 Potassium paramolybdate
Related compounds
 Molybdenum(VI) oxide
Molybdic acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Ammonium heptamolybdate is the inorganic compound whose chemical formula is (NH4)6Mo7O24, normally encountered as the tetrahydrate. A dihydrate is also known. It is a colorless solid, often referred to as ammonium paramolybdate or simply as ammonium molybdate, although "ammonium molybdate" can also refer to ammonium orthomolybdate, (NH4)2MoO4, and several other compounds. It is one of the more common molybdenum compounds.[1]

  1. ^ Cite error: The named reference Ull was invoked but never defined (see the help page).