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214477 Sigma-Aldrich

Silica gel

high-purity grade (Davisil Grade 923), pore size 30 Å, 100-200 mesh

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Properties

Related Categories Analytical/Chromatography, Davisil Irregular Silica Gel, Essential Chemicals, Other Silica Gels, Research Essentials,
grade   high-purity grade (Davisil Grade 923)
mfr. no.   Davisil®
particle size   100-200 mesh
  75-150 μm
pore size   0.40 cm3/g pore volume
  30 Å
surface area   430-530 m2/g
bp   2230 °C
mp   >1600 °C

Description

Packaging

1 kg in poly bottle

50, 250 g in poly bottle

Application

Silica gel was used to compare MCM-41 type mesoporous adsorbents.1

General description

Silica gel is a rigid 3D network of colloidal silica.2 It is exclusively used as a support material for the active titanium(III) centers in Ziegler-Natta catalysts. Silica gel allows a controlled fragmentation lresulting in the formation of uniform polymer particles with narrow particle size distribution and high bulk density.3 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 extraction2

Footnote

Recommended Applications
Grade 923 meets ASTM D1319 specifications for hydrocarbon analysis

Legal Information

Davisil is a registered trademark of W.R. Grace & Co.-Conn.

Price and Availability

Suggested Laboratory Gloves


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Safety & Documentation

Safety Information

WGK Germany 
nwg

Protocols & Articles

Articles

Silica Gel Adsorbents

Silica gels are used as an adsorbent in numerous applications, including chromatographic separations and removal of impurities through adsorption. In chromatography or column chromatography, the stat...
Shyam Verma
Market Segment Manager, Reagents & Chemicals shyam.verma@sial.comAnalytix, Volume 9 Article 3
Keywords: Adsorption, Chromatography, Column chromatography, Flash chromatography, Indicators, Organic synthesis, Purification, Reversed-phase chromatography

Peer-Reviewed Papers

References

Set your institution to view full text papers.

1. Dissipative water intrusion in hydrophobic MCM-41 type materials. Martin T, Lefevre B, Brunel D, et al. Chem. Commun. (Camb.) (1), 24-5, (2002)

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2. A simple method for production of pure silica from rice hull ash Kalapathy, U., A. Proctor, and J. Shultz. Bioresour. Technol. 73, 257-262, (2000)

3. Silica gel supported zirconocene dichloride/methylalumoxane catalysts for ethylene polymerization: Effects of heterogenation on activity, polymer microstructure and product morphology. Janiak, Christoph, and Bernhard Rieger. Angew. Makromol. Chem. 215, 47-57, (1994)

Fieser 9,410 / Fieser 10,346 / Fieser 11,466 / Fieser 12,431

Aldrich MSDS 1, 1601:A / Corp MSDS 1 (2), 3090:A / RegBook 1 (3), 3535:C

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