High purity Colloidal silica
This kind of product mainly applies to the food, the beverage, the electrolyte, the catalyst etc, which has the high profession of the impurity content reques.
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Item |
Model and Standard |
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|
CS-20 |
CS-25 |
CS-30 |
XCS-20 |
XCS-25 |
XCS-30 |
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|
Appearance |
>Slight milky transparent to translucent liquid |
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|
Na2O (wt%) |
≤0.2% |
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SiO2 (wt%) |
20±1% |
25±1% |
30±1% |
20±1% |
25±1% |
30±1% |
|
|
"Density (20°C,g/cm3) |
1.12-1.14 |
1.15-1.17 |
1.19-1.21 |
1.12-1.14 |
1.15-1.17 |
1.19-1.21 |
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|
Impurity substance |
Fe |
≤50ppm |
≤30ppm |
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|
Cl- |
≤50ppm |
≤20ppm |
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|
SO42- |
≤50ppm |
≤20ppm |
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|
Al2O3 |
≤100ppm |
≤30ppm |
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|
CO32- |
≤100ppm |
≤10ppm |
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Other |
≤100ppm |
≤20ppm |
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pH(20°C) |
8.0-9.5 |
8.0-9.5 |
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Viscosity (20℃,mPas) |
≤35 |
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Particle size (nm) |
8-15 |
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Stability |
6 months |
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