Merck
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S5505

Sigma-Aldrich

Silica, fumed

powder, 0.2-0.3 μm avg. part. size (aggregate)

Sinônimo(s):
Silica, Silicon dioxide, Silicic anhydride, Silicon dioxide amorphous
Fórmula linear:
SiO2
Número CAS:
Peso molecular:
60.08
Número MDL:
ID de substância PubChem:
NACRES:
NA.22

forma

powder

Nível de qualidade

200

índice de refração

n20/D 1.46 (lit.)

Tamanho médio da partícula

0.2-0.3 μm (aggregate)

área da superfície

200 m2/g±25 m2/g

densidade

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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Aplicação

Fumed Silica (SiO2) has been used as a precursor to synthesize:
  • 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.

Embalagem

500 g in poly drum
100 g in poly bottle

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

WGK

WGK 2

Ponto de fulgor (ºF)

Not applicable

Ponto de fulgor (ºC)

Not applicable

Equipamento de proteção individual

Eyeshields, Gloves, type N95 (US)

Certificado de análise

Insira o número de lote para pesquisar o Certificado de análise (COA).

Certificado de origem

Insira o número de lote para pesquisar o Certificado de origem (COO).

Product Information Sheet

Mais documentos

Quotes and Ordering

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)
Synthesis of nano-structured 3C-SiC by carbothermal reduction of silicon bearing gel and carbon soot
Sharma M, et al.
Materials Letters, 65(14), 2161-2164 (2011)
Platinum catalysed aerobic selective oxidation of cinnamaldehyde to cinnamic acid
Durndell LJ, et al.
Catalysis Today, 333(4), 161-168 (2019)
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)
Organosilane modified silica/polydimethylsiloxane mixed matrix membranes for enhanced propylene/nitrogen separation
Beltran AB, et al.
Applied Surface Science, 258(1), 337-345 (2011)

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