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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)

surface area

590-690 m2/g , TEM

particle size

5-20 nm (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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1 of 4

This Item
6372381.13126806862
Silicon dioxide nanopowder (spherical, porous), 5-20 nm particle size (TEM), 99.5% trace metals basis

Sigma-Aldrich

637246

Silicon dioxide

Silicon dioxide nanopowder, 10-20 nm particle size (BET), 99.5% trace metals basis

Sigma-Aldrich

637238

Silicon dioxide

Silicon dioxide colloidal, highly dispersed, EMPROVE® ESSENTIAL, Ph. Eur., JP, NF, E 551

SAFC

1.13126

Silicon dioxide

Silica mesoporous SBA-15, <150 μm particle size, pore size 6 nm, Hexagonal pore morphology

Sigma-Aldrich

806862

Silica

form

nanopowder (spherical, porous)

form

nanopowder

form

solid

form

powder

particle size

5-20 nm (TEM)

particle size

10-20 nm (BET)

particle size

-

particle size

<150 μm

surface area

590-690 m2/g (TEM)

surface area

-

surface area

-

surface area

700 m2/g±50 m2/g

bp

2230 °C (lit.)

bp

2230 °C (lit.)

bp

2230 °C (lit.)

bp

2230 °C (lit.)

mp

>1600 °C (lit.)

mp

>1600 °C (lit.)

mp

>1600 °C (lit.)

mp

>1600 °C (lit.)

General description

Porous silicon dioxide nanopowder, also known as silica or silicon dioxide is a fine, white powder with a porous structure. It is composed of nanoscopic particles of silicon dioxide, 5-20 nm in size and has a high surface area due to its porous structure.

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.
  • Mesoporous silica is used as a catalyst support in the preparation of multiwalled carbon nanotubes (MWCNTs).
  • It is used as a ring opening of tetrahydrofuran-dimethanol to 1,2,6-hexanetriol.
  • It maybe used to prepare silica/brominated poly(phenylene oxide) nanocomposites membranes for CO2 seperations.
  • The composite scaffold of chitosan/chondroitin sulfate/nano-SiO2 was fabricated by lyophilization.
  • 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.
  • PMMA SiO2 nanocomposites were reported to be synthesized.

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

Certificates of Analysis (COA)

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MMYOMAG-74K-13

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Silicon dioxide

Catalyst studies on the ring opening of tetrahydrofuran-dimethanol to 1, 2, 6-hexanetriol
Buntara T, et al.
Catalysis Today, 210, 106-116 (2013)
Nanocomposite membranes for CO2 separations: silica/brominated poly (phenylene oxide)
Hu X, et al.
Industrial & Engineering Chemistry Research, 46(5), 1547-1551 (2007)
Molecularly imprinted polymer beads prepared by pickering emulsion polymerization for steroid recognition
Zhou T, et al.
Journal of Applied Polymer Science, 131(1) (2014)
Carbon nanotube bundles self-assembled in double helix microstructures.
Cervantes-Sodi F, et al.
Carbon, 50(10), 3688-3693 (2010)
Effect of surface modification of silica nanoparticles on toxicity and cellular uptake by human peripheral blood lymphocytes in vitro
Lankoff A, et al.
Nanotoxicology, 7(3), 235-250 (2011)

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