Ammonium orthomolybdate

Ammonium orthomolybdate
Names
Other names
Diammonium molybdate
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.032.741 Edit this at Wikidata
EC Number
  • 236-031-3
  • InChI=1S/Mo.2H3N.4O/h;2*1H3;;;;/q;;;;;2*-1/p+2
    Key: APUPEJJSWDHEBO-UHFFFAOYSA-P
  • [NH4+].O=[Mo]([O-])([O-])=O.[NH4+]
Properties
(NH4)2MoO4
Molar mass 196.02 g/mol
Appearance colorless monoclinic crystals
Density 2.276 g/cm3
Melting point decomposes upon heating
soluble
Solubility insoluble in alcohol and liquid ammonia
Hazards
Lethal dose or concentration (LD, LC):
1870 mg/kg (rabbit, oral)
2200 mg/kg (guinea pig, oral)
1600 mg/kg (cat, oral)[1]
120 mg Mo/kg (rat, oral)
120 mg Mo/kg (guinea pig, oral)[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Ammonium orthomolybdate is the inorganic compound with the chemical formula (NH4)2MoO4. It is a white solid that is prepared by treating molybdenum trioxide with aqueous ammonia. Upon heating these solutions, ammonia is lost, to give ammonium heptamolybdate ((NH4)6Mo7O24·4H2O).

  1. ^ a b "Molybdenum (soluble compounds, as Mo)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).