Aerosil 200 Extra Pure / CAS 7631-86-9
Aerosil 200 Extra Pure (silica) is a white powder with a silicon dioxide content greater than 99.8% on ignited material. Molecular formula: SiO2.
| CAS No. | 7631-86-9 |
|---|---|
| Grade | Extra Pure |
| Molecular formula | SiO2 |
| Appearance | White powder |
| SiO2 content, based on ignited material | > 99.8% |
| Specific surface area (BET) | 175–225 m2/g |
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Product Details
Aerosil 200 Extra Pure, listed by Oxford as silicic acid, is a silica powder for laboratory and research use. Its listed specifications include a BET specific surface area of 175–225 m2/g and a silicon dioxide content greater than 99.8% based on ignited material.
| Product | Aerosil 200 Extra Pure |
|---|---|
| Synonym | Silicic Acid |
| Supplier article no. | A-00347 |
| CAS No. | 7631-86-9 |
| Grade | Extra Pure |
| Molecular formula | SiO2 |
| Appearance | White powder |
| Loss on drying at 105°C | ≤ 1.5% |
| SiO2 content, based on ignited material | > 99.8% |
| Specific surface area (BET) | 175–225 m2/g |
| pH value in 4% dispersion | 3.7–4.5 |
| Tamped density | Approximately 50 g/L |
| Shelf life | 5 years |
| HSN Code | 38249990 |
Applications: Fumed silica is commonly used to control rheology and thixotropy, thicken or stabilize liquid systems, and improve powder flow and anti-caking properties. Suitability depends on the specific procedure and application.
For laboratory and research settings worldwide. Refer to the supplier’s product documentation for handling and storage guidance.