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95410

Sigma-Aldrich

Tungsten(VI) oxide

powder, puriss., 99.9%

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:
12352303
PubChem Substance ID:
329770456
NACRES:
NA.23
Pricing and availability is not currently available.

grade

puriss.

Quality Level

200

Assay

99.9%

form

powder

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(VI) oxide (WO3) is a semiconducting material with excellent electrochromic properties. It is a cost efficient material with a high optical modulation. It can be synthesized by a variety of methods which include chemical vapor deposition, electrodeposition, and other sol-gel based coating processes.[1]

Application

WO3 can be used for a wide range of applications such as electrochemical devices,[2] photocatalysis,[3] biological sensors,[4] and other display devices.[1]

Caution

may contain dark blue particles.

Storage Class Code

13 - Non Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCM5780
BCCG9453
BCCF5033
BCCD1275
BCCC1936

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Electrochemical reduction of tungsten compounds to produce tungsten powder
Erdogan M and Karakaya I
Metall. Mater. Trans. B (2010)
Inkjet printing of sol-gel derived tungsten oxide inks
Vidmar T, et al.
Solar Energy Materials and Solar Cells, 125, 87-95 (2014)
Sidra Farid et al.
Nanotechnology, 31(9), 095706-095706 (2019-11-12)
We report a detailed analysis on the effects of processing parameters for sputtered tungsten trioxide (WO3) thin nanoscale films on their structural, vibrational and electrical properties. The research aims to understand the fundamental aspects of WO3 sputtering at relatively low
Wenshuo Xu et al.
Small (Weinheim an der Bergstrasse, Germany), 16(3), e1905985-e1905985 (2019-12-20)
2D semiconducting transition metal dichalcogenides (TMDs) are endowed with fascinating optical properties especially in their monolayer limit. Insulating hBN films possessing customizable thickness can act as a separation barrier to dictate the interactions between TMDs. In this work, vertical layered
Building of peculiar heterostructure of Ag/two-dimensional fullerene shell-WO3-x for enhanced photoelectrochemical performance
Ren Y, et al.
Applied Catalysis. B, Environmental, 231, 381-390 (2018)
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Questions

1–3 of 3 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  3. WO3 합성에 쓰인 precursor와 합성 방법을 알려주실 수 있나요?

    1 answer

    1. This product is categorized as a Quality Level 200. The methods of preparation are proprietary for items with Quality Levels under 400. There may be additional information found in the Peer Reviewed Papers section of the product page:

      https://www.sigmaaldrich.com/search/95410?focus=papers&page=1&perpage=30&sort=relevance&term=95410&type=citation_search

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