60741

Silica gel

high-purity grade, average pore size 60 Å (52-73 Å), 70-230 mesh, 63-200 μm, for column chromatography

• CAS Number: 112926-00-8
• EC Number: 231-545-4
• MDL number: MFCD00011232
• UNSPSC Code: 12352309
• PubChem Substance ID: 329759187
• NACRES: SB.52

Properties

• grade: high-purity grade
• Quality Level: 200
• description: activity acc. to Brockmann and Schodder 2 - 3
• form: powder or crystals
• manufacturer/tradename: Sigma-Aldrich
• technique(s): LPLC: suitable
• surface area: 470-530 m²/g
• matrix: Silica
• matrix active group: silica
• particle size: 63-200 μm; 70-230 mesh
• pore size: 0.7-0.85 cm³/g pore volume; 60 Å average pore size (52-73 Å)
• bp: 2230 °C
• mp: >1600 °C
• separation technique: hydrophilic interaction (HILIC)
• SMILES string: O=[Si]=O
• InChI: 1S/O2Si/c1-3-2
• InChI key: VYPSYNLAJGMNEJ-UHFFFAOYSA-N

Description

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

Application

Silica gel may be used in separation of single-walled carbon nanotube (SWNT) by simple filtration.

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: nwg
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Gloves, type N95 (US)