Property |
Value |
Appearance | Free-flowing powder from white to light grey colour without strange dissemination |
Mass part of silicon dioxide, SiO2 wt%, min. | 99,0-99,3 |
рН of suspension, min. | ≥ 3,9 |
Loss on heating, (2 hrs at 105 0С), wt.%, max. | < 0,5 |
Loss on calcination, (2 hrs at 1000 0С), wt.%, max. | ≤ 2 |
Molal concentration of methyl-silyl groups, mmol/gr, min. | 0,3 |
Molal concentration of hydroxyl groups, mmol/gr. | 0,05 |
Mass part of moisture, %, max | 0,6 |
Bulk density, g/dm3 | |
noncompacted | 35-60 |
compacted | 70-100 |
Specific surface, m2/gr by BET method | 120 ± 20 |
Hydrophobicity % | >99,0 |