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Fumed Silica

CAS No.:112945-52-5

MF:SiO2

Appearance:White Powder

Purity:99.8%

Technical Details
ItemTypical value
Silica content(based on ignited material) ,wt%>99.8%
Specific surface area (BET), m2/g 200+-15
Carbon content(Based on drying at 105℃ for 2 hours) ,wt%<0.15
PH-value in 4% dispersion3.7-4.5
Moisture loss on drying 2 hour at 105℃, wt%<1.5
Ignition loss 2 hours at 1000℃ based on material dried for 2 hours at 105℃, wt%<2.0
Sieve residue(45um), wt%<0.04
Tamped Density(Based on drying at 105℃ for 2 hours) ,g/L40-60
Properties

Fumed silica is an extremely small particle with enormous surface area, high purity, and a tendency to form chains in the chemical manufacturing process.

Particles are formed by injecting chlorosilanes, such as silicon tetrachloride, into a flame of hydrogen and air. The ensuring reaction produces fumed silica and hydrogen chloride.

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