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342890

Sigma-Aldrich

Silicon dioxide

−325 mesh, 99.5% trace metals basis

Synonym(s):

Cristobalite, Quartz, Sand, Silica

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About This Item

Linear Formula:
SiO2
CAS Number:
60676-86-0
Molecular Weight:
60.08
EC Number:
262-373-8
MDL number:
MFCD00011232
UNSPSC Code:
12352303
PubChem Substance ID:
24861083
NACRES:
NA.23
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Quality Level

100

Assay

99.5% trace metals basis

form

powder

refractive index

n20/D 1.544 (lit.)

particle size

−325 mesh

mp

1610 °C (lit.)

density

2.6 g/mL at 25 °C (lit.)

application(s)

battery manufacturing

SMILES string

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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Application

SiO2 is majorly used as a substrate material with excellent thermo-mechanical properties which can be used in a variety of applications which include: vapor deposition[1][2], phase deposition[3], atomic force microscopy probes(AFM)[4], spin coating[5], electronic based devices.[6]

Other Notes

May contain adsorbed H2O and CO2 which is removable by calcining at >900°C

Storage Class Code

13 - Non Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
MKCW1671
MKCV5291
MKCT1789
MKCQ0211
MKCN2365

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Exciton diffusion measurements in poly (3-hexylthiophene).
Shaw PE, et al.
Advanced Materials, 20(18), 3516-3520 (2008)
Growth model of bamboo-shaped carbon nanotubes by thermal chemical vapor deposition.
Lee CJ and Park J
Applied Physics Letters, 77(21), 3397-3399 (2000)
The effect of calcination temperature on the surface microstructure and photocatalytic activity of TiO2 thin films prepared by liquid phase deposition.
Yu J, et al.
The Journal of Physical Chemistry B, 107(50), 13871-13879 (2003)
Oxygen-aided synthesis of polycrystalline graphene on silicon dioxide substrates.
Chen J, et al.
Journal of the American Chemical Society, 133(44), 17548-17551 (2011)
Measurement of the adhesion force between carbon nanotubes and a silicon dioxide substrate.
Whittaker JD, et al.
Nano Letters, 6(5), 953-957 (2006)
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Questions

  1. Is it(342890) porous silica? I want to know the specific surface area and particle size distribution(dispersity) (Batch number is MKCT1789)

    1 answer

    1. The quality specifications for product no. 342890-100G Silicon dioxide do not include a determination of its specific surface area. Our supplier does characterize the product as porous silica.

      As the Certificate of Analysis for lot MKCT1789 shows, the mean particle size is 2.08 microns. Detailed QC testing shows:
      Diameter at 10%: 0.45 microns
      Diameter at 50%: 2.06 microns
      Diameter at 90%: 3.88 microns

      Future lots of the product might vary in their particle size characteristics within the quality specification of being no larger than 45.00 microns.

      Helpful?

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