Silica, fumed
ALDRICH/S5130 - powder
Synonym: Silica; Silicic anhydride; Silicon dioxide; Silicon dioxide amorphous
CAS Number: 112945-52-5
Empirical Formula (Hill Notation): O2Si
Molecular Weight: 60.08
MDL Number: MFCD00011232
Linear Formula: SiO2
Product Type: Chemical
density | 2.3 lb/cu.ft at 25 °C (bulk density)(lit.) |
form | powder |
InChI | 1S/O2Si/c1-3-2 |
InChI key | VYPSYNLAJGMNEJ-UHFFFAOYSA |
Quality Level | 200 ![]() |
refractive index | n |
SMILES string | O=[Si]=O |
surface area | 395 m2/g±25 m2/g |
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. Preparation of epoxidized natural rubber/fumed silica composites have been reported. Interaction of Gemini surfactant C12-s-C122Br with aqueous suspension of fumed silica has been studied. Fumed silica based nanocomposites reinforced with organo clay may be prepared. TiO2/fumed silica porous ceramic material was used to prepare photocatalytic materials. |
Features and Benefits: | Has interesting thickening and thixotropic properties, and an enormous external surface area. |
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. |
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 |
Packaging: | 500 g in poly drum |
RIDADR | NONH for all modes of transport |
WGK Germany | WGK 2 |
Flash Point(F) | Not applicable |
Flash Point(C) | Not applicable |
Density | 2.3 lb/cu.ft at 25 °C (bulk density)(lit.) |
Refractive Index | n |
UNSPSC | 12352300 |