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
S5505
Silica, fumed
powder, 0.2-0.3 μm avg. part. size (aggregate)
Synonym(s):
Silica, Silicic anhydride, Silicon dioxide, Silicon dioxide amorphous
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100 G
$112.00
500 G
$186.00
About This Item
Linear Formula:
SiO2
CAS Number:
Molecular Weight:
60.08
MDL number:
UNSPSC Code:
12352103
PubChem Substance ID:
NACRES:
NA.22
Recommended Products
form
powder
Quality Level
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
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Application
Fumed Silica (SiO2) has been used as a precursor to synthesize:
It can be also used in the preparation of:
- 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]
Features and Benefits
Has interesting thickening and thixotropic properties, and an enormous external surface area.
Other Notes
Particle sizes are for primary particles, which form branched, chain-like aggregates a few tenths of a micron long.
Storage Class Code
11 - Combustible Solids
WGK
WGK 2
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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Effect of C/S ratio on morphology and structure of hydrothermally synthesized calcium silicate hydrate
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