Aerosil 200
Silicon Dioxide, Fumed Silica
- CAS
- 7631-86-9
- EC
- 231-545-4
- Sectors
- Coatings, Adhesives, Sealants & Elastomers, Rubber & Elastomers
Aerosil 200 (CAS 7631-86-9) is a high-purity amorphous fumed silica, a white to yellow inorganic silicon dioxide supplied as a fine suspension-forming solid, and it is used in coatings, inks, sealants and adhesives for rheology control and as a reinforcing agent in silicone rubber. It has a specific surface area of approximately 200 m²/g and provides exceptional thickening, anti-settling, and flow-enhancing properties across a wide range of formulations.
Typical Properties
| Molecular formula | O2Si |
|---|---|
| Molecular weight | 60.08 g/mol |
| Form | suspension |
| Color | White to yellow |
| Odor | at 100.00?%. odorless |
| Melting point | 1713 °C |
| Boiling point | 2230 °C |
| Density | 0.729 g/cm³ (solid) |
| Water solubility | insoluble |
| Flash point | 2230°C |
| pH | 5-8 (100g/l, H2O, 20°C)(slurry) |
| GHS signal word | Danger · Irritant / harmful, Health hazard |
| HS code | 2811221000 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Aerosil 200
Applications
It is used in coatings, inks, sealants, and adhesives for rheology control, and as a reinforcing agent in silicone rubber. In pharmaceuticals and cosmetics, it functions as a glidant and carrier for active ingredients.
Safety & Risks
Inhalation of airborne dust can cause respiratory irritation. Implement local exhaust ventilation and wear suitable respiratory protection. Avoid prolonged exposure to moisture, which reduces product performance.
Packaging
Available in 10–20 kg multi-wall paper bags or FIBCs lined with PE; stored in dry, closed areas to prevent contamination.