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:
EC Number:
MDL number:
UNSPSC Code:
41115711
PubChem Substance ID:
NACRES:
NC.07
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grade
high-purity grade
Quality Level
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
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General description
Silica gel is a rigid 3D network of colloidal silica.[1] 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.[2] 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[1]
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[1]
Application
Silica gel was used on glass plates to perform preparative thin layer chromatography.[3]
Storage Class Code
11 - Combustible Solids
WGK
nwg
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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