Fumed Silica 7631-86-9

We are offering product name: fumed silica
molecular formula: sio2
melting point: 1710℃
vapour pressure: 32hpa(25℃)
related density: 2.2gcm3 (20℃)
specification:
testing item standard
silicon dioxide (%) ≥ 99.8
aluminium oxide ≤ 500ppm
titanium dioxide ≤ 300ppm
ferric oxide ≤ 30ppm
content of carbon ≤ 0.2ppm
chloride (%) ≤ 0.025
45μm sieve residue (%) ≤ 0.05
ph value in aqueous dispersion 3.6-4.5
volatilization loss (105℃) (%) ≤ 3
ignition loss (%) ≤ 2.5
surface area
appearance white powder
cas no.: 7631-86-9 einecs: 238-878-4
usage: it is white, loose, amorphous, non-toxic and non-odorous nonmetal oxide. Due to the nanometer effect, it has excellent properties, such as reinforce, bodying, thixotropy, insulation and others. Therefore, it can be widely used in the rubber, plastic, paint coating, adhesive, seals and other polymer industrial area.
Packages: 10kgpaper bag.
Storage: keep in a cool, dry, well-ventilated place. Store away from incompatible substances such as oxidizing agents.