288500
Silica gel
high-purity grade, pore size 60 Å, 2-22 μm particle size distribution, without binder, suitable for thin layer chromatography (TLC)
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About This Item
CAS Number:
NACRES:
NC.07
PubChem Substance ID:
UNSPSC Code:
41115711
EC Number:
231-545-4
MDL number:
grade
high-purity grade
Quality Segment
form
powder
manufacturer/tradename
Sigma-Aldrich
technique(s)
thin layer chromatography (TLC): suitable
surface area
~500 m2/g
impurities
≤0.01% Fe3+
particle size distribution
2-22 μm
pore size
60 Å pore size
pH
~6.8 (10% in aq. suspension)
bp
2230 °C
mp
>1600 °C
anion traces
chloride (Cl-): ≤0.01%
SMILES string
O=[Si]=O
InChI
1S/O2Si/c1-3-2
InChI key
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
General description
Silica gel is a rigid 3D network of colloidal silica. It is exclusively used as a support material for the active titanium(III) centers in Ziegler-Natta catalysts. It allows a controlled fragmentation resulting in the formation of uniform polymer particles with narrow particle size distribution and high bulk density. Silica gel is classified as below:
a. Aquagel - pores are filled with water
b. Xerogel - by the process of evaporation, aqueous phase in the pores are removed
c. Aerogel - solvent removed by supercritical extraction
a. Aquagel - pores are filled with water
b. Xerogel - by the process of evaporation, aqueous phase in the pores are removed
c. Aerogel - solvent removed by supercritical extraction
Application
Silica gel was used on glass plates to perform preparative thin layer chromatography.
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Storage Class
11 - Combustible Solids
wgk
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
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