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391484 Sigma-Aldrich

Silica gel

high-purity grade (7734), pore size 60 Å, 70-230 mesh

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Properties

Related Categories Analytical/Chromatography, EMD Millipore Grades, EMD Millipore Irregular Silica Gel, Essential Chemicals, Research Essentials,
grade   high-purity grade (7734)
form   powder
mfr. no.   EMD Millipore
particle size   63-200 μm
  70-230 mesh
pore size   ~0.8 cm3/g pore volume
  60 Å
surface area   550 m2/g
bp   2230 °C
mp   >1600 °C

Description

Packaging

1 kg in poly bottle

100 g in poly bottle

5 kg in fiber drum

Application

Silica gel was used as an adsorbent to separate compounds by chromatography. It was used to compare MCM-41 type mesoporous adsorbents.
It may be used in the synthesis of the following:
• Silica gel-immobilized-dithioacetal derivatives.
• Piperazino silica reagent for removing 9-fluorenylmethyloxycarbonyl amino protecting group.
• Polysiloxanes silica hybrids.

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 resulting in the formation of 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

Price and Availability

Safety & Documentation

Safety Information

WGK Germany 
nwg

Documents

Certificate of Analysis

Certificate of Origin

Protocols & Articles
Peer-Reviewed Papers
15

References

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