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/418/501/product-dating-information-06-25-mk.pdf
748161
Silica
nanoparticles, mesoporous, 200 nm particle size, pore size 4 nm
Synonym(s):
Silicon dioxide
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$358.00
$1,220.00
$358.00
Estimated to ship onFebruary 02, 2026Details
About This Item
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InChI key
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
InChI
1S/O2Si/c1-3-2
SMILES string
O=[Si]=O
form
mesoporous, nanoparticles
particle size
200 nm
pore size
4 nm pore size
bp
2230 °C (lit.)
mp
>1600 °C (lit.)
application(s)
battery manufacturing
Quality Level
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Related Categories
1 of 4
This Item | 806862 | 938165 | 938270 |
|---|---|---|---|
| particle size 200 nm | particle size <150 μm | particle size 500 nm | particle size 100 μm |
| form mesoporous, nanoparticles | form powder | form powder | form mesoporous, powder |
| mp >1600 °C (lit.) | mp >1600 °C (lit.) | mp >1600 °C (lit.) | mp >1600 °C (lit.) |
| pore size 4 nm pore size | pore size 0.5-0.7 cm3/g pore volume, 6 nm pore size | pore size 40 Å pore size | pore size ~40 Å pore size |
| bp 2230 °C (lit.) | bp 2230 °C (lit.) | bp 2230 °C (lit.) | bp 2230 °C (lit.) |
| application(s) battery manufacturing | application(s) - | application(s) - | application(s) - |
Application
Features and Benefits
General description
Storage Class
11 - Combustible Solids
wgk
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
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Articles
Mesoporous silica used in wastewater remediation, air cleaning, catalysis, bio-catalysis, and drug delivery.
Mesoporous Materials include a range of high surface area porous silicates with applications in gas adsorption, drug delivery, diagnostics and catalysis.
Recent demand for electric and hybrid vehicles, coupled with a reduction in prices, has caused lithium-ion batteries (LIBs) to become an increasingly popular form of rechargeable battery technology.
RAFT polymerization controls chain growth, yields defined polymers without cytotoxic heavy metals like ATRP.
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
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What is the solubility of this product in water at room temperature? Product description: 748161-1G, source MKCW6973 Silica nanoparticles, mesoporous, 200 nm particle size, pore size 4 nm. CAS No: 7631-86-9
1 answer-
This material is not technically soluble, but is often prepared as a dispersion in water. Many nanoparticle dispersions are prepared at 5% in water. Related commercial products, such as Ludox products, are colloidal suspensions at concentrations of 30 - 40%. Please see the links below to review several examples.
Nanoparticle dispersions
https://www.sigmaaldrich.com/substance/silicananoparticles60087631869Ludox colloidal silica
https://www.sigmaaldrich.com/search/ludox-colloidal-silica?focus=products&page=1&perpage=30&sort=relevance&term=ludox%20colloidal%20silica&type=productHelpful?
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Is this silica nanoparticle hydrophobic?
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This product does not have a contact angle measurement to test its hydrophobicity. Generally, non-functionalized silica is hydrophilic.
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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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