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267856

Sigma-Aldrich

Molybdenum(VI) oxide

ACS reagent, ≥99.5%

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Synonym(s):
Molybdenum trioxide
Linear Formula:
MoO3
CAS Number:
Molecular Weight:
143.94
EC Number:
MDL number:
PubChem Substance ID:

grade

ACS reagent

Assay

≥99.5%

form

powder

reaction suitability

reagent type: catalyst
core: molybdenum

impurities

≤0.01% insol. dil. NH4OH

mp

795 °C (lit.)

anion traces

AsO43-, PO43- and SiO2: ≤0.001%
chloride (Cl-): ≤0.002%
nitrate (NO3-): passes test
phosphate (PO43-): ≤5 ppm
sulfate (SO42-): ≤0.02%

cation traces

NH4+: ≤0.002%
heavy metals (as Pb): ≤0.005%

SMILES string

O=[Mo](=O)=O

InChI

1S/Mo.3O

InChI key

JKQOBWVOAYFWKG-UHFFFAOYSA-N

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1 of 4

This Item
69850M0753203815
Molybdenum(VI) oxide ACS reagent, ≥99.5%

Sigma-Aldrich

267856

Molybdenum(VI) oxide

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

Sigma-Aldrich

69850

Molybdenum(VI) oxide

-
Molybdenum(VI) oxide ReagentPlus®, ≥99.5%

Sigma-Aldrich

M0753

Molybdenum(VI) oxide

-
Molybdenum(VI) oxide 99.97% trace metals basis

Sigma-Aldrich

203815

Molybdenum(VI) oxide

-
assay

≥99.5%

assay

99.5%

assay

≥99.5%

assay

99.97% trace metals basis

form

powder

form

powder

form

crystals

form

powder

impurities

≤0.01% insol. dil. NH4OH

impurities

-

impurities

-

impurities

-

mp

795 °C (lit.)

mp

795 °C (lit.)

mp

795 °C (lit.)

mp

795 °C (lit.)

anion traces

AsO43-, PO43- and SiO2: ≤0.001%, chloride (Cl-): ≤0.002%, nitrate (NO3-): passes test, phosphate (PO43-): ≤5 ppm, sulfate (SO42-): ≤0.02%

anion traces

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

anion traces

-

anion traces

-

Application

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.

Pictograms

Exclamation markHealth hazard

Signal Word

Warning

Hazard Statements

Hazard Classifications

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

Target Organs

Respiratory system

Storage Class Code

11 - 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)
Eagleson M.
Concise Encyclopedia Chemistry, 509-509 (1994)
Eagleson M.
Concise Encyclopedia Chemistry, 224-224 (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)
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)

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