Chemical Product Library / Reference
Fumed silica
Chemical identity, technical indicators, performance and application reference. Confirm specifications and regulatory suitability against supplier documentation.
Chemical identity
| English name | Fumed silica |
|---|---|
| English synonyms | Pyrogenic silica;Silica, fumed;Aerosil |
| Chinese name | 气相二氧化硅 |
| Chinese synonyms | 气相法二氧化硅;气相法白炭黑;无定形二氧化硅;硅酐 |
| Chemical category | Additives |
| CAS No. | 112945-52-5 |
| EINECS No. | 231-545-4 |
| Molecular formula | SiO2 |
| Molecular weight | 60.08 |
PubChem structure images are reference depictions, not proof of composition, purity, grade, or regulatory status. Mixtures and polymers may not have a single representative structure.
Technical indicators
SiO2 content ≥99.8%; specific surface area (BET) according to grade (e.g. 150–400 m²/g); water ≤2.5%; pH (4% aqueous suspension) 3.7–4.7; loss on ignition ≤2.0%
Performance characteristics
White amorphous nano-powder, high specific surface area, surface silanol groups
Application scenarios
Silicone rubber reinforcing agent, coating thickening thixotrope, adhesives, composites, cosmetics