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637246

Sigma-Aldrich

Silicon dioxide

nanopowder (spherical, porous), 5-20 nm particle size (TEM), 99.5% trace metals basis

Synonym(s):
Silica, Silicon dioxide
Linear Formula:
SiO2
CAS Number:
Molecular Weight:
60.08
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

Quality Level

assay

99.5% trace metals basis

form

nanopowder (spherical, porous)

particle size

5-20 nm (TEM)

surface area

590-690 m2/g (TEM)

bp

2230 °C (lit.)

mp

>1600 °C (lit.)

density

2.2-2.6 g/mL at 25 °C

bulk density

0.068 g/mL

SMILES string

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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Application

Silicon dioxide finds applications in various fields, ranging from catalysis to composite synthesis. Some major studies are listed here:
  • Pickering emulsion polymerization using a silicon dioxide nanoparticle stabilizer to form molecularly imprinted polymers for steroid recognition.
[92]
  • Mesoporous silica is used as a catalyst support in the preparation of multiwalled carbon nanotubes (MWCNTs).
  • [93]
  • It is used as a ring opening of tetrahydrofuran-dimethanol to 1,2,6-hexanetriol.
  • [95]
  • It maybe used to prepare silica/brominated poly(phenylene oxide) nanocomposites membranes for CO2 seperations.
  • [94]
  • The composite scaffold of chitosan/chondroitin sulfate/nano-SiO2 was fabricated by lyophilization.
  • [37]
  • Nanocomposites preparation of silica, single-wall carbon nanotubes, and graphite nanoplatelets in an epoxy matrix have been reported.6
  • Dielectric spectroscopy study of the polystyrene/nanosilica model system has been studied.
  • [97]
  • PMMA SiO2 nanocomposites were reported to be synthesized.
  • Packaging

    50 g in glass bottle
    250, 500 g in poly drum

    Storage Class Code

    11 - Combustible Solids

    WGK

    nwg

    Flash Point(F)

    Not applicable

    Flash Point(C)

    Not applicable

    Personal Protective Equipment

    dust mask type N95 (US), Eyeshields, Gloves

    Certificate of Analysis

    Enter Lot Number to search for Certificate of Analysis (COA).

    Certificate of Origin

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