High-purity fumed silica (SiO₂ ≥99.8%) — a white fluffy powder widely used as a reinforcing filler, thickener, and anti-settling agent in paints, coatings, printing inks, adhesives, and silicone rubber. Available in grades K-60, K-150, K-200, K-200R, K-300, and K-380.
| ITEM | STANDARD REQUIREMENT | TEST RESULT |
|---|---|---|
| Appearance | Fluffy white powder | Fluffy white powder |
| Ignition Loss / % | ≤2.5 | ≤1.0 |
| SiO₂ Content / % | ≥99.8 | ≥99.8 |
| Al₂O₃ Content / (mg/kg) | ≤400 | ≤3 |
| Fe₂O₃ Content / (mg/kg) | ≤30 | ≤3 |
| Chloride Content (T-Cl) / (mg/kg) | ≤250 | ≤50 |
| pH Value of Suspension | 3.7 - 4.5 | 4.1 - 4.3 |
| Drying Loss at 105℃ / % | ≤3.0 | ≤1.0 |
| Nitrogen Adsorption Specific Surface Area (BET) / (m²/g) | ≤250 | ≤25 |
High-purity potassium carbonate for glass, fertilizer, and detergent industries
Learn More →
