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Merck
CN

69850

Molybdenum(VI) oxide

puriss. p.a., 99.5%

Synonym(s):

Molybdenum trioxide

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About This Item

Linear Formula:
MoO3
CAS Number:
1313-27-5
Molecular Weight:
143.94
NACRES:
NA.21
PubChem Substance ID:
329761261
UNSPSC Code:
12352303
EC Number:
215-204-7
MDL number:
MFCD00003469
Assay:
99.5%
Form:
powder

Key Documents

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Product Name

Molybdenum(VI) oxide, puriss. p.a., 99.5%

mp

795 °C (lit.)

InChI key

JKQOBWVOAYFWKG-UHFFFAOYSA-N

InChI

1S/Mo.3O

SMILES string

O=[Mo](=O)=O

grade

puriss. p.a.

assay

99.5%

form

powder

anion traces

chloride (Cl-): ≤20 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Ca: ≤20 mg/kg
Cd: ≤10 mg/kg
Co: ≤20 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤20 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤10 mg/kg
NH4+: ≤50 mg/kg
Na: ≤50 mg/kg
Ni: ≤20 mg/kg
Pb: ≤20 mg/kg
Zn: ≤20 mg/kg

Quality Level

200

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Application

Molybdenum(VI) oxide (MoO3) has been used as a starting material for the deposition of Mo (Molybdenum) over the MgO-330 and MgO-500 supports by employing methanol as solvent.
Precursor to LAMOX fast ion conductors and superconductors.
Used in the solid state synthesis of a remarkable ternary, reduced molybdenum oxide, Pr4Mo9O18, whose structure contains previously unknown Mo7, Mo13 and Mo19 clusters. The new cluster product is a small band gap semiconductor.

General description

Molybdenum(VI) oxide (MoO3) is an acidic metal(VI) oxide. It is widely employed in selective oxidation reactions. Its temperature-programmed reduction has been reported. Kinetics and mechanism of its reduction in the presence of hydrogen, propene, butene-1 and CO has been investigated. It is reduced to metal upon reaction with hydrogen at high temperatures.

pictograms

Health hazardExclamation mark
GHS08,GHS07

signalword

Warning

Hazard Classifications

Carc. 2 - Eye Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

13 - Non Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

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Kinetics and mechanism of molybdenum (VI) oxide reduction.
Sloczynski J.
Journal of Solid State Chemistry, 118(1), 84-92 (1995)
Temperature-programed reduction of molybdenum (VI) oxide and molybdenum (IV) oxide.
Arnoldy P, et al.
The Journal of Physical Chemistry, 89(21), 4517-4526 (1985)
Eagleson M.
Concise Encyclopedia Chemistry, 224-224 (1994)
Eagleson M.
Concise Encyclopedia Chemistry, 509-509 (1994)
High-activity MgO-supported CoMo hydrodesulfurization catalysts prepared by non-aqueous impregnation.
Kaluza L, et al.
Applied Catalysis. B, Environmental, 162, 430-436 (2015)
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