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
550086
Tungsten(VI) oxide
nanopowder, <100 nm particle size (TEM)
Synonym(s):
Tungsten oxide, Tungsten trioxide, Tungstic oxide, Tungstic anhydride
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$63.84
List Price$67.20In StockDetails
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About This Item
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$63.84
List Price$67.20In StockDetails
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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This Item | 232785 | 204781 | 95410 |
|---|---|---|---|
| form nanopowder | form powder | form powder | form powder |
| particle size <100 nm (TEM) | particle size ≤25 μm | particle size - | particle size - |
| density 7.16 g/mL at 25 °C (lit.) | density 7.16 g/mL at 25 °C (lit.) | density 7.16 g/mL at 25 °C (lit.) | density 7.16 g/mL at 25 °C (lit.) |
| Quality Level 100 | Quality Level 200 | Quality Level 100 | Quality Level 200 |
General description
Storage Class
11 - Combustible Solids
wgk_germany
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
dust mask type N95 (US), Eyeshields, Gloves
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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What is the size distribution for this particles? Can I observe them via AFM?
1 answer-
Unfortunately, the size distribution of Product 550086 has not been tested. However, 100 nm particles should be visible in AFM.
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Hi, I am interested to purchase these nanoparticles, is it possible to see the TEM images? I need spherical nanoparticles and could not see an indication of the shape. And lastly, are they stored in water? Thank you very much. Best regards
1 answer-
These nanoparticles are generally spherical.
See the TEM image below.
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