Overview
Silicon dioxide ( CAS 112945-52-5 ), commercially known as synthetic amorphous silica or fumed silica, is a high-purity, engineered form of silica produced through vapor-phase hydrolysis.
Unlike crystalline or precipitated grades, this material is manufactured specifically to deliver controlled rheology modification, anti-settling, and foam suppression across demanding industrial formulations.
In coatings and adhesives, it functions as a thixotropic agent, preventing sagging in applied films and controlling flow in sealants and structural adhesives for industrial use.
Personal care formulators incorporate it to adjust texture, improve powder flowability, and stabilize emulsions in products such as sunscreens and pressed cosmetics for consumers.
Lubricant manufacturers use it as a thickener in grease formulations and as a reinforcing filler where thermal stability under load is required for heavy machinery applications.
In plastics and polymer processing, it acts as an anti-blocking agent in film extrusion and supports stabilization of pigment dispersions in masterbatches during the manufacturing process.
Synthetic amorphous silica is supplied as a low-bulk-density white powder, with hydrophilic and hydrophobic surface-treated variants available to suit aqueous or solvent-based systems.
Standard grades include food-grade ( FCC compliant) and technical grades, with surface area specifications typically used to differentiate reinforcing versus flow-aid applications.
Contact us for supply of Silicon dioxide
Physical Properties
| Melting Point | >1600°C |
| Density | 2.3 lb/cu.ft at 25 °C (bulk density)(lit.) |
| Appearance | Amorphous silica, the noncrystalline form of SiO2, is a transparent to gray, odorless, amorphous powder |
| Form | powder |
| Refractive Index | n 20/D 1.46(lit.) |
Safety & Handling
Warning GHS07 GHS08 Hazard Statements H315 Causes skin irritation H319 Causes serious eye irritation H320 Causes eye irritation H335 May cause respiratory irritation H341 Suspected of causing genetic defects H350 May cause cancer H372 Causes damage to organs through prolonged or repeated exposure H373 May causes damage to organs through prolonged or repeated exposure Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 28112290 |
| Storage Class | 13 - Non Combustible Solids |
| WGK (Germany) | 2 |
Other Names
Related Products
Chemical Properties
- CAS Number
- 112945-52-5
- EC Number
- 601-084-9
- Mol. Weight
- 60.084
- HS Code
- 28112290
- Category
- Silicones & Silicates