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69850

Molybdenum(VI) oxide

Name: Molybdenum(VI) oxide
Brand: SIGALD

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

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Properties

grade

puriss. p.a.

Quality Level

200

assay

99.5%

form

powder

mp

795 °C (lit.)

anion traces

chloride (Cl^-): ≤20 mg/kg, sulfate (SO₄^2-): ≤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

SMILES string

O=[Mo](=O)=O

InChI

1S/Mo.3O

InChI key

JKQOBWVOAYFWKG-UHFFFAOYSA-N

Description

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.

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, Mo₁₃and Mo₁₉ clusters. The new cluster product is a small band gap semiconductor.

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pictograms

GHS08,GHS07

signalword

Warning

hcodes

H319,H335,H351

pcodes

P202 - P261 - P264 - P271 - P305 + P351 + P338 - P308 + P313

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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Eagleson M.

Concise Encyclopedia Chemistry, 224-224 (1994)