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Sigma-Aldrich

Silicon dioxide

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
EC Number:
231-545-4
MDL number:
MFCD00011232
UNSPSC Code:
12352302
PubChem Substance ID:
24882840
NACRES:
NA.23
Pricing and availability is not currently available.

Quality Level

100

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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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.[1]
  • Mesoporous silica is used as a catalyst support in the preparation of multiwalled carbon nanotubes (MWCNTs).[2]
  • It is used as a ring opening of tetrahydrofuran-dimethanol to 1,2,6-hexanetriol.[3]
  • It maybe used to prepare silica/brominated poly(phenylene oxide) nanocomposites membranes for CO2 seperations.[4]
  • The composite scaffold of chitosan/chondroitin sulfate/nano-SiO2 was fabricated by lyophilization.[5]
  • 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.[6]
  • 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

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Certificates of Analysis (COA)

Lot/Batch Number
MKCV7595
MKCW6848
MKCW2768
MKCV4617
MKCT1891

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Catalyst studies on the ring opening of tetrahydrofuran-dimethanol to 1, 2, 6-hexanetriol
Buntara T, et al.
Catalysis Today, 210, 106-116 (2013)
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)
Carbon nanotube bundles self-assembled in double helix microstructures.
Cervantes-Sodi F, et al.
Carbon, 50(10), 3688-3693 (2010)
Molecularly imprinted polymer beads prepared by pickering emulsion polymerization for steroid recognition
Zhou T, et al.
Journal of Applied Polymer Science, 131(1) (2014)
Nanocomposite membranes for CO2 separations: silica/brominated poly (phenylene oxide)
Hu X, et al.
Industrial & Engineering Chemistry Research, 46(5), 1547-1551 (2007)
View All Related Papers

Articles

Self-Assembled Nanodielectrics (SANDs) for Unconventional Electronics

Review the potential of self-assembled multilayer gate dielectric films fabricated from silane precursors for organic, inorganic, and transparent TFT and for TFT circuitry and OLED displays.

Self-Assembled Nanodielectrics (SANDs) for Unconventional Electronics

Review the potential of self-assembled multilayer gate dielectric films fabricated from silane precursors for organic, inorganic, and transparent TFT and for TFT circuitry and OLED displays.

Self-Assembled Nanodielectrics (SANDs) for Unconventional Electronics

Review the potential of self-assembled multilayer gate dielectric films fabricated from silane precursors for organic, inorganic, and transparent TFT and for TFT circuitry and OLED displays.

Self-Assembled Nanodielectrics (SANDs) for Unconventional Electronics

Review the potential of self-assembled multilayer gate dielectric films fabricated from silane precursors for organic, inorganic, and transparent TFT and for TFT circuitry and OLED displays.

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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

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    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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