60740
Silica gel Inorganic Sorbent
high-purity grade (puriss), 70-230 mesh
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关于此项目
化学文摘社编号:
UNSPSC Code:
12352309
PubChem Substance ID:
NACRES:
SB.52
EC Number:
231-545-4
MDL number:
产品名称
硅胶, high-purity grade (puriss), pore size 60 Å, 70-230 mesh, for column chromatography
grade
high-purity grade (puriss)
Quality Segment
description
activity acc. to Brockmann and Schodder 2 - 3
form
powder
manufacturer/tradename
Sigma-Aldrich
technique(s)
LPLC: suitable
surface area
500 m2/g
matrix
Silica
matrix active group
silica
particle size
63-200 μm, 70-230 mesh
pore size
0.8 cm3/g pore volume, 60 Å
pH
6.0-7.5 (25 °C, 10% in H2O)
bp
2230 °C
mp
>1600 °C
anion traces
chloride (Cl-): ≤100 mg/kg, nitrate (NO3-): ≤50 mg/kg, sulfate (SO42-): ≤50 mg/kg
cation traces
Cu: ≤5 mg/kg, Fe: ≤20 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg
separation technique
hydrophilic interaction (HILIC)
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. Silica gel allows a controlled fragmentation leading to form 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 may be used in separation of single-walled carbon nanotube (SWNT) by simple filtration.
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存储类别
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flash_point_c
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