S5505
Silica, fumed
powder, 0.2-0.3 μm avg. part. size (aggregate)
Sinônimo(s):
Silica, Silicic anhydride, Silicon dioxide, Silicon dioxide amorphous
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About This Item
Fórmula linear:
SiO2
Número CAS:
Peso molecular:
60.08
Número MDL:
Código UNSPSC:
12352103
ID de substância PubChem:
NACRES:
NA.22
Produtos recomendados
Formulário
powder
área da superfície
200 m2/g (±25 m2/g)
índice de refração
n20/D 1.46 (lit.)
Tamanho médio da partícula
0.2-0.3 μm (aggregate)
densidade
2.3 lb/cu.ft at 25 °C (bulk density)(lit.)
cadeia de caracteres SMILES
O=[Si]=O
InChI
1S/O2Si/c1-3-2
chave InChI
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
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Aplicação
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.
- 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.
Características e benefícios
Has interesting thickening and thixotropic properties, and an enormous external surface area.
Outras notas
Particle sizes are for primary particles, which form branched, chain-like aggregates a few tenths of a micron long.
Código de classe de armazenamento
11 - Combustible Solids
Classe de risco de água (WGK)
WGK 2
Ponto de fulgor (°F)
Not applicable
Ponto de fulgor (°C)
Not applicable
Equipamento de proteção individual
Eyeshields, Gloves, type N95 (US)
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Effect of C/S ratio on morphology and structure of hydrothermally synthesized calcium silicate hydrate
He Y, et al.
Journal of Wuhan University of Technology-Materials Science Edition, 26(4), 770-773 (2011)
Organosilane modified silica/polydimethylsiloxane mixed matrix membranes for enhanced propylene/nitrogen separation
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Applied Surface Science, 258(1), 337-345 (2011)
Silica sulfuric acid: an efficient and reusable catalyst for the one-pot synthesis of 3, 4-dihydropyrimidin-2 (1H)-ones
Salehi P, et al.
Tetrahedron Letters, 44(14), 2889-2891 (2003)
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