Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explosions.
Keep away from alkaline materials, strong bases,
strong acids, oxoacids, epoxides; chemically active metals
(such as potassium, sodium, magnesium and zinc) may
cause a violent reaction.
Poison by ingestion and
intraperitoneal routes. Moderately toxic by
other routes. An irritant. See also
MOLYBDENUM COMPOUNDS. When
heated to decomposition it emits toxic
fumes of NH3 and NOx.
Pure molybdic oxide (99.95% MoO3) is prepared by sublimation of technical oxide or by calcining ammonium molybdate. Metallic molybdenum powder is prepared commercially by hydrogen reduction of either pure molybdic oxide or ammonium molybdate in a two-step process.
It is used as an analytical reagent, in
pigments and in the production of molybdenum metal and
Crystallise the salt from water (2.5mL/g) by partial evaporation in a desiccator. [Sturdivant J Am Chem Soc 59 630 1937, Grüttner & Jauder in Handbook of Preparative Inorganic Chem (Ed. Brauer) Academic Press Vol II p 1711 1965.]
There are no known UN/DOT restrictions.
Ammonium molybdate is a colorless, white or
slightly greenish-yellow powder.
ChEBI: An ammonium salt composed of ammonium and molybdate ions in a 2:1 ratio.