Fumed Silica CAS#112945-52-5
Excellent Thickening and Thixotropic Performance：Synthetic Amorphous Silica provides strong thickening effects and thixotropic behavior, making it ideal for applications requiring controlled viscosity.
Extremely Large External Surface Area：Its exceptionally high surface area enhances performance in formulations, improving stability, reinforcement, and absorption capabilities.
High-Purity Production via Vapor-Phase Hydrolysis：Manufactured through advanced vapor-phase hydrol-ysis of chlorosilanes in a hydrogen–oxygen flame, it ensures consistent quality and reliable material charact-eristics.
Free of Detectable Crystalline Silica: The product is collected in a dry state and contains no measurable crystalline silica, offering improved safety and compliance in sensitive applications.
Synthetic Amorphous Silica exhibits notable thickening and thixotropic behavior, along with a very large external surface area. It is manufactured through a vapor-phase hydrolysis process in which chlorosilanes or substituted silanes, such as silicon tetrachloride, are reacted in a hydrogen–oxygen flame. The resulting material is generated and collected in a dry form, and it contains no detectable crystalline silica.
| Product Name: | Fumed Silica |
| Synonyms: | acticel;SILICA GEL 7G;SILICA GEL 8-20 MESH;SILICA GEL 12-28 MESH;SILICA GEL 100;SILICA GEL 30;SILICA GEL 60 G;WATER-IMPREGNATED SILICA GEL |
| CAS: | 112945-52-5 |
| MF: | O2Si |
| MW: | 60.08 |
| EINECS: | 231-545-4 |
| Product Categories: | UVCBs-inorganic;metal oxide |
| Mol File: | 112945-52-5.mol |
Fumed Silica Chemical Properties
| Melting point | >1600°C |
| density | 2.3 lb/cu.ft at 25 °C (bulk density)(lit.) |
| refractive index | n |
| solubility | Practically insoluble in organic solvents, water, and acids, except hydrofluoric acid; soluble in hot solutions of alkali hydroxide. Forms a colloidal dispersion with water. For Aerosil, solubility in water is 150 mg/L at 258℃ (pH 7). |
| form | powder |
| Specific Gravity | 2.2 |
| Hydrolytic Sensitivity | 5: forms reversible hydrate |
| InChI | InChI=1S/O2Si/c1-3-2 |
| InChIKey | VYPSYNLAJGMNEJ-UHFFFAOYSA-N |
| SMILES | [Si](=O)=O |
| CAS DataBase Reference | 112945-52-5(CAS DataBase Reference) |
| EPA Substance Registry System | Silica, amorphous, fumed, cryst.-free (112945-52-5) |
