appearance | White fluffy powder |
SiO2 content (%) | ≥99.8 |
TiO2 content (%) | ≤0.03 |
Sieve residue (according to Mocker,45μm) | ≤0.05% |
Approximation of compactness | 50 g/L |
PH (5% water suspension) | 6.0-6.5 |
Oil absorption (g/100g) | 330-350 |
Heating reduction (105ºC for 2 hours) | ≤1.5% |
BET surface area | 200±25 M2/g |
Burning weight loss (1000ºC) | ≤2.0% |