Fumed Silica
Pyrogenic Silica
- CAS
- 112945-52-5
- EC
- 601-084-9
- Sectors
- Coatings, Adhesives, Sealants & Elastomers, Rubber & Elastomers
Fumed Silica (CAS 112945-52-5) is a high-purity amorphous powder produced by flame hydrolysis of silicon tetrachloride, with extremely fine particles and a large surface area, supplied as Technical Grade material and used as a rheology modifier, anti-caking agent and reinforcing filler in coatings, sealants and elastomers.
Typical Properties
| Molecular weight | 60.08 g/mol |
|---|---|
| Form | powder |
| Melting point | >1600°C |
| Density | 2.3 lb/cu.ft at 25 °C (bulk density) |
| GHS signal word | Danger · Irritant / harmful, Health hazard |
| HS code | 28112290 |
| 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.
Fumed Silica
Applications
Used as a rheology modifier, anti-caking agent, and reinforcing filler in coatings, sealants, and elastomers. Also applied in pharmaceuticals for flow improvement.
Safety & Risks
Inhalable dust may cause respiratory irritation; use local exhaust ventilation and respiratory protection.
Packaging
Delivered in 10–20 kg PE-lined bags. Store sealed, dry, and away from moisture to prevent agglomeration.