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
S5505
Silica, fumed
powder, 0.2-0.3 μm avg. part. size (aggregate)
Synonym(s):
Silica, Silicic anhydride, Silicon dioxide, Silicon dioxide amorphous
Select a Size
| Size/SKU | Availability | Price |
|---|
About This Item
form
powder
Quality Segment
surface area
200 m2/g (±25 m2/g)
refractive index
n20/D 1.46 (lit.)
avg. part. size
0.2-0.3 μm (aggregate)
density
2.3 lb/cu.ft at 25 °C (bulk density)(lit.)
SMILES string
O=[Si]=O
InChI
1S/O2Si/c1-3-2
InChI key
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
Application
- Chlorosilanes via silanization, which are used to prepare silica/polydimethylsiloxane membranes to study permeation performance.
- Silicon carbide (SiC) nanoparticles by sol-gel method.
- Calcium silicate hydrate (C-S-H) by treating with CaO and water via hydrothermal reaction.
- Si/PtO2 catalyst for the selective conversion of cinnamaldehyde to cinnamic acid by aerobic oxidation.
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.
- HClO4-SiO2 heterogeneous catalyst used in the synthesis of tetrasubstituted imidazoles.
Features and Benefits
Other Notes
1 of 1
This Item | |||
|---|---|---|---|
| form powder | form powder | form powder | form powder |
| density 2.3 lb/cu.ft at 25 °C (bulk density)(lit.) | density - | density 2.3 lb/cu.ft at 25 °C (bulk density)(lit.) | density - |
| surface area 200 m2/g (±25 m2/g) | surface area 175-225 m2/g | surface area 395 m2/g (±25 m2/g) | surface area - |
| avg. part. size 0.2-0.3 μm (aggregate) | avg. part. size - | avg. part. size - | avg. part. size - |
| refractive index n20/D 1.46 (lit.) | refractive index - | refractive index n20/D 1.46 (lit.) | refractive index - |
| Quality Level 200 | Quality Level 100 | Quality Level 200 | Quality Level - |
Still not finding the right product?
Explore all of our products under Silica, fumed
Storage Class
11 - Combustible Solids
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
Choose from one of the most recent versions:
Already Own This Product?
Find documentation for the products that you have recently purchased in the Document Library.
-
How can I determine the shelf life / expiration / retest date of this product?
1 answer-
Helpful?
-
-
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
Helpful?
-
-
is this hydrophobic
1 answer-
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
Helpful?
-