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S5130 Aldrich

Silica, fumed

powder, 0.007 μm

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

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.)
cation traces   metal ions:, practically free

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.

Price and Availability

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