S5505
Silica, fumed
powder, 0.2-0.3 μm avg. part. size (aggregate)
Sinonimo/i:
Silica, Silicic anhydride, Silicon dioxide, Silicon dioxide amorphous
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About This Item
Formula condensata:
SiO2
Numero CAS:
Peso molecolare:
60.08
Numero MDL:
Codice UNSPSC:
12352103
ID PubChem:
NACRES:
NA.22
Prodotti consigliati
Stato
powder
Livello qualitativo
Area superficiale
200 m2/g (±25 m2/g)
Indice di rifrazione
n20/D 1.46 (lit.)
Dimens. media delle particelle
0.2-0.3 μm (aggregate)
Densità
2.3 lb/cu.ft at 25 °C (bulk density)(lit.)
Stringa SMILE
O=[Si]=O
InChI
1S/O2Si/c1-3-2
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
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Applicazioni
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.
Caratteristiche e vantaggi
Has interesting thickening and thixotropic properties, and an enormous external surface area.
Altre note
Particle sizes are for primary particles, which form branched, chain-like aggregates a few tenths of a micron long.
Codice della classe di stoccaggio
11 - Combustible Solids
Classe di pericolosità dell'acqua (WGK)
WGK 2
Punto d’infiammabilità (°F)
Not applicable
Punto d’infiammabilità (°C)
Not applicable
Dispositivi di protezione individuale
Eyeshields, Gloves, type N95 (US)
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