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550086

Sigma-Aldrich

Tungsten(VI) oxide

nanopowder, <100 nm particle size (TEM)

Synonym(s):

Tungstic anhydride

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About This Item

Linear Formula:
WO3
CAS Number:
1314-35-8
Molecular Weight:
231.84
EC Number:
215-231-4
MDL number:
MFCD00011466
UNSPSC Code:
12352302
PubChem Substance ID:
24879090
NACRES:
NA.23

form

nanopowder

particle size

<100 nm (TEM)

density

7.16 g/mL at 25 °C (lit.)

SMILES string

O=[W](=O)=O

InChI

1S/3O.W

InChI key

ZNOKGRXACCSDPY-UHFFFAOYSA-N

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General description

Tungsten oxide (WO3) nanopowder is a metallic powder that can be prepared by the calcination of ammonium paratungstate (APT) in the temperature range of 560°C and 850°C. It can be produced by a variety of techniques, such as electrodeposition, sputtering, milling, and chemical processes.

Application

WO3 can be used for a variety of applications, such as electronics, optics, gas sensors and elecctrochromism.

Storage Class Code

11 - Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

550086-25G:
550086-BULK:
550086-VAR:
550086-5G:

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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?Writing-Reading-Erasing? on tungsten oxide films using the scanning electrochemical microscope
Turyan I, et al.
Advanced Materials, 12(5), 330-333 (2000)
Structural Properties of Pure and Nickel-Modified Nanocrystalline Tungsten Trioxide.
Fujioka Y, et al.
The Journal of Physical Chemistry C, 116(32), 17029-17039 (2012)
Thermal effects associated with the Raman spectroscopy of WO3 gas-sensor materials.
Garcia-Sanchez RF, et al.
The Journal of Physical Chemistry A, 117(50), 13825-13831 (2013)
A thin-film sensing element for ozone, humidity and temperature
Qu W and Wlodarski W
Sensors and Actuators B, Chemical, 64(1-3), 42-48 (2000)
Structure and electronic properties of solid acids based on tungsten oxide nanostructures
Barton DG, et al.
The Journal of Physical Chemistry B, 103(4), 630-640 (1999)
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