60740

Silica gel

high-purity grade (puriss), pore size 60 Å, 70-230 mesh, for column chromatography

• CAS Number: 112926-00-8
• EC Number: 231-545-4
• MDL number: MFCD00011232
• UNSPSC Code: 12352309
• PubChem Substance ID: 329759185
• NACRES: SB.52

Properties

• grade: high-purity grade (puriss)
• Quality Level: 100
• 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 (SO₄^2-): ≤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

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 Code: 11 - Combustible Solids
• WGK: nwg
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves