53698

Silica gel Inorganic Sorbent

spherical, 200-360 mesh

• Synonym(s): Silica gel
• CAS Number: 112926-00-8
• EC Number: 231-545-4
• MDL number: MFCD00011232
• UNSPSC Code: 23201100
• PubChem Substance ID: 329757970
• NACRES: SB.52

Properties

• product name: Silica gel spherical, 40-75 μm particle size
• grade: high-purity grade
• form: powder
• manufacturer/tradename: Sigma-Aldrich
• technique(s): LPLC: suitable
• surface area: 450-550 m²/g
• loss: ~5% loss on drying
• matrix: Silica
• matrix active group: silica
• particle size: 200-400 mesh; 40-75 μm
• pore size: 0.7-0.9 cm³/g pore volume; 60 Å pore size
• pH: ~7 (5% in H₂O, suspension)
• 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.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: nwg
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable