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
Wichtige Dokumente
S5505
Kieselsäureanhydrid
powder, 0.2-0.3 μm avg. part. size (aggregate)
Synonym(e):
Kieselgel, Pyrogenes Siliciumdioxid, Silicium(IV)-oxid, Siliciumdioxid amorph
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About This Item
Empfohlene Produkte
Form
powder
Oberflächenbereich
200 m2/g (±25 m2/g)
Brechungsindex
n20/D 1.46 (lit.)
Durchschnittliche Teilgröße
0.2-0.3 μm (aggregate)
Dichte
2.3 lb/cu.ft at 25 °C (bulk density)(lit.)
SMILES String
O=[Si]=O
InChI
1S/O2Si/c1-3-2
InChIKey
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
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Anwendung
- Chlorosilanes via silanization, which are used to prepare silica/polydimethylsiloxane membranes to study permeation performance.[1]
- Silicon carbide (SiC) nanoparticles by sol-gel method.[2]
- Calcium silicate hydrate (C-S-H) by treating with CaO and water via hydrothermal reaction.[3]
- Si/PtO2 catalyst for the selective conversion of cinnamaldehyde to cinnamic acid by aerobic oxidation.[4]
It can be also used in the preparation of:
- Silica sulfuric acid catalyst used in the synthesis of 3,4-dihydropyrimidin-2(1H)-ones via one-pot three-component Biginelli reaction.[5]
- HClO4-SiO2 heterogeneous catalyst used in the synthesis of tetrasubstituted imidazoles.[6]
Leistungsmerkmale und Vorteile
Sonstige Hinweise
Lagerklassenschlüssel
11 - Combustible Solids
WGK
WGK 2
Flammpunkt (°F)
Not applicable
Flammpunkt (°C)
Not applicable
Persönliche Schutzausrüstung
Eyeshields, Gloves, type N95 (US)
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Analysenzertifikate (COA)
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How is shipping temperature determined? And how is it related to the product storage temperature?
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How can I determine the shelf life / expiration / retest date of this product?
1 Antwort-
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.pdfHilfreich?
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is this hydrophobic
1 Antwort-
This product is hydrophilic. Please see the data sheet for more information: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/246/034/s5505pis.pdf
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