Precipitated silica — Silicone Product Encyclopedia — Jiangxi New Materials Co., Ltd.
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Precipitated silica
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Precipitation Silica is commonly known as white carbon black, also known as hydrated silicic acid and light silica. Its chemical expression is generally written as mSiO2·nH2O. Its appearance is a white, highly dispersed amorphous powder, which is also processed into granules as a commodity. The specific gravity is 2.319~2.653, and the melting point is 1750℃. Insoluble in water and most acids, it will become aggregated fine particles after absorbing moisture in the air. Soluble in caustic soda and hydrofluoric acid. It is stable to other chemicals, resistant to high temperatures, does not decompose, and does not burn. It has high electrical insulation, porosity, large internal surface area, water absorption, and non-toxicity.
- Precipitated silica
- Precipitated silica
- White carbon black
- mSiO2·nH2O
- White highly dispersed amorphous powder
2.30-2.65
2.5-2.6
2.9-3.0
2.9-3.0
PH value
6.8-7.0
6.8-7.0
6.8-7.0
6.8-7.0
Sodium sulfate%
<0.8
<0.8
<0.8
<0.8
Total iron content m g/kg
<180
<180
<180
<180
Total copper content m g/kg
<10
<10
<10
<10
Total manganese content mg/kg
<10
<10
<10
<10
Bulk density g/100ml
12-14
7-9
6-8
2.5-2.6
2.9-3.0
2.9-3.0
PH value
6.8-7.0
6.8-7.0
6.8-7.0
6.8-7.0
Sodium sulfate%
<0.8
<0.8
<0.8
<0.8
Total iron content m g/kg
<180
<180
<180
<180
Total copper content m g/kg
<10
<10
<10
<10
Total manganese content mg/kg
<10
<10
<10
<10
Bulk density g/100ml
12-14
7-9
6-8
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<180
<180
<180
<180
Total copper content m g/kg
<10
<10
<10
<10
Total manganese content mg/kg
<10
<10
<10
<10
Bulk density g/100ml
12-14
7-9
6-8
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12-14
7-9
6-8
