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S5130 Aldrich

Silica, fumed

powder, 0.007 μm

Synonym: Silica, Silicic anhydride, Silicon dioxide amorphous, Silicon dioxide

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Properties

Related Categories Materials Science, Metal and Ceramic Science, Oxides, Silicon
form   powder
refractive index   n20/D 1.46(lit.)
particle size   0.007 μm
surface area   395 m2/g±25 m2/g
density   2.3 lb/cu.ft at 25 °C (bulk density)(lit.)

Description

Features and Benefits

Has interesting thickening and thixotropic properties, and an enormous external surface area.

Other Notes

Particle sizes are for primary particles, which form branched, chain-like aggregates a few tenths of a micron long.

Packaging

25, 100 g in poly bottle

500 g in poly drum

Application

Fumed silica is used to deplete lipids and hormones in Taqman assays of human hepatoma cells HuH-7 and human liver cell line HepG2.1 Preparation of epoxidized natural rubber/fumed silica composites have been reported.2 Interaction of Gemini surfactant C12-s-C122Br with aqueous suspension of fumed silica has been studied.3 Fumed silica based nanocomposites reinforced with organo clay may be prepared.4 TiO2/fumed silica porous ceramic material was used to prepare photocatalytic materials.5

General description

Fumed silica may be synthesized by high temperature hydrolysis of SiCl4 in O2(N2)/H2 flame. It is amorphous in nature and possesses very high specific area. The micro droplets of amorphous silica fuse into a branch and form a chain like agglomerate.

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Safety & Documentation

Safety Information

WGK Germany 
2
RTECS 
VV7310000

Protocols & Articles

Peer-Reviewed Papers

References

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1. PPARd increases expression of the human apolipoprotein A-II gene in human liver cells." International journal of molecular medicine Thulin P, et al. Int. J. Mol. Med. 21(6), 819-824, (2008)

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2. Interaction Between Fumed-Silica and Epoxidized Natural Rubber Luo YY, et al. J. Inorg. Organomet. Polym. Mater. 21(4), 777-783, (2011)

3. Preparation and properties of TiO2/fumed silica composite photocatalytic materials Yu Y, et al. Procedia Eng. 27, 448-456, (2012)

4. Melt rheology of organoclay and fumed silica nanocomposites Ph. Cassagnau Polymer 49(9), 2183-2196, (2008)

5. Zheng O, et al. Energy Procedia 16 Part B, 1211-1219, (2012)

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