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Silicon dioxide

Name: Silicon dioxide
Brand: ALDRICH

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

Synonym(s):

Silica, Nanosilica, Silicon dioxide

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About This Item

Linear Formula:

SiO₂

CAS Number:

7631-86-9

Molecular Weight:

60.08

NACRES:

NA.23

PubChem Substance ID:

24882840

UNSPSC Code:

12352302

EC Number:

231-545-4

MDL number:

MFCD00011232

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Properties

Quality Level

100

assay

99.5% trace metals basis

form

nanopowder (spherical, porous)

reaction suitability

core: silicon

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

Description

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.

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Storage Class

11 - Combustible Solids

wgk

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.