288519

Silica gel

high-purity grade, pore size 60 Å, 5-25 μm particle size, without binder, suitable for thin layer chromatography (TLC)

• CAS Number: 7631-86-9
• EC Number: 231-545-4
• MDL number: MFCD00011232
• UNSPSC Code: 41115711
• PubChem Substance ID: 24857347
• NACRES: NB.21

Properties

• material: plastic support; silica gel 60 matrix
• Quality Level: 100
• grade: high-purity grade
• form: powder
• feature: binder Organic Polymer; fluorescent indicator: no
• packaging: pkg of 250 g
• manufacturer/tradename: Sigma-Aldrich
• technique(s): thin layer chromatography (TLC): suitable
• surface area: ~500 m²/g
• impurities: ≤0.001% Fe³⁺
• particle size: 5-25 μm
• pore size: 0.75 cm³/g pore volume; 60 Å medium pore diameter; 60 Å pore size
• pH: ~6.8 (10% in aq. suspension)
• bp: 2230 °C
• mp: >1600 °C
• anion traces: chloride (Cl^-): ≤0.003%
• 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.[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[3]

Application

Silica gel was used on glass plates to perform preparative thin layer chromatography.[3]

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: nwg
• flash_point_f: Not applicable
• flash_point_c: Not applicable