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203815

Sigma-Aldrich

Molybdenum(VI) oxide

99.97% trace metals basis

Synonym(s):

Molybdenum trioxide

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About This Item

Linear Formula:
MoO3
CAS Number:
1313-27-5
Molecular Weight:
143.94
EC Number:
215-204-7
MDL number:
MFCD00003469
UNSPSC Code:
12352303
eCl@ss:
38180807
PubChem Substance ID:
24852067
NACRES:
NA.23

Assay

99.97% trace metals basis

form

powder

mp

795 °C (lit.)

application(s)

battery manufacturing

SMILES string

O=[Mo](=O)=O

InChI

1S/Mo.3O

InChI key

JKQOBWVOAYFWKG-UHFFFAOYSA-N

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General description

Molybdenum(VI) oxide, also known as molybdenum trioxide, is a compound of molybdenum and oxygen with the approximate chemical formula of MoO3. Typically, it a white or light yellow powder, although molybdenum(VI) oxide can adopt a high concentration of defects including oxygen vacancies that impart a bluish or greenish color. Molybdenum(VI) oxide has a high melting point of 2,620 °C. Chemically, molybdenum(VI) oxide is a strong oxidizing agent and has a high work function. Consequently, it is used as a catalyst in chemical reactions and as a starting material to produce other molybdenum compounds. In addition, it is added to pigments, glasses, lubricants, and plastics.

Application

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.
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

Health hazardExclamation mark
GHS08,GHS07

Signal Word

Warning

Hazard Statements

H319,H335,H351

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Lili Cai et al.
Nano letters, 11(2), 872-877 (2011-01-26)
We report an atmospheric, catalyst-free, rapid flame synthesis technique for growing single, branched, and flower-like α-MoO(3) nanobelt arrays on diverse substrates. The growth rate, morphology, and surface coverage density of the α-MoO(3) nanobelts were controlled by varying the flame equivalence
MoO3 films spin-coated from a nanoparticle suspension for efficient hole-injection in organic electronics.
Jens Meyer et al.
Advanced materials (Deerfield Beach, Fla.), 23(1), 70-73 (2010-10-27)
Kourosh Kalantar-zadeh et al.
Nanoscale, 2(3), 429-433 (2010-07-21)
The formation of MoO(3) sheets of nanoscale thickness is described. They are made from several fundamental sheets of orthorhombic alpha-MoO(3), which can be processed in large quantities via a low cost synthesis route that combines thermal evaporation and mechanical exfoliation.
Efficient, large area ITO-and-PEDOT-free organic solar cell sub-modules.
Hui Jin et al.
Advanced materials (Deerfield Beach, Fla.), 24(19), 2572-2577 (2012-04-11)
Yu-Zhan Wang et al.
The Journal of chemical physics, 134(3), 034706-034706 (2011-01-26)
The electronic structures at the MoO(3)∕Co interface were investigated using synchrotron-based ultraviolet and x-ray photoelectron spectroscopy. It was found that interfacial chemical reactions lead to the reduction of Mo oxidation states and the formation of Co-O bonds. These interfacial chemical
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