UNISIL AS 200 (HYDROPHILIC FUMED SILICA)
GENERAL INFORMATION
UNISIL AS 200 is a high-purity, synthetic, amorphous, hydrophilic fumed silica manufactured through flame hydrolysis of silicon tetrachloride. It exhibits excellent thixotropic, thickening, and anti-settling properties, making it suitable for a wide range of industrial and pharmaceutical applications.
PRODUCT DESCRIPTION
| PROPERTY | DESCRIPTION |
|---|---|
| Product Name | UNISIL AS 200 |
| Chemical Name | Hydrophilic Fumed Silica |
| Appearance | White, fluffy powder |
| CAS Number | 112945-52-5 |
| Purity (SiO₂ content) | ≥ 99.8% |
| Specific Surface Area | ~200 m²/g (BET) |
| pH (4% in water) | 3.6 – 4.5 |
| Bulk Density | ~50 g/L (untamped) |
| Moisture (Loss on Drying) | ≤ 1.5% |
APPLICATION AREAS
| INDUSTRY | APPLICATION EXAMPLES |
| Coatings | Anti-settling, thixotropy control |
| Adhesives & Sealants | Rheology modification, sag resistance |
| Silicone Rubber | Reinforcing filler |
| Pharmaceuticals | Free-flow agent, glidant |
| Agrochemicals | Suspension stabilizer, anti-caking agent |
| Cosmetics | Thickening and texture enhancement |
| Inks & Paints | Viscosity control and matting |
TECHNICAL SPECIFICATIONS
| PARAMETER | VALUE |
| BET Surface Area | 190–210 m²/g |
| pH (4% dispersion) | 3.6–4.5 |
| Loss on Drying (105°C) | ≤ 1.5% |
| SiO₂ Content | ≥ 99.8% |
| Bulk Density | ~50 g/L |
| Particle Size (Primary) | ~7–40 nm |
| Refractive Index | ~1.46 |
ADVANTAGES
Excellent thickening and thixotropic behavior
High purity and consistent quality
Improves free-flow in powders and granulates
Enhances mechanical properties in elastomers
Provides anti-settling effect in liquid systems
Compatible with a wide range of formulations
Superior reinforcing filler for silicone rubber
PACKAGING / STORAGE
| PACKAGING TYPE | QUANTITY |
| Multi-layer paper bag | 10 kg or 20 kg |
| Big Bag (FIBC) | 150–200 kg |
| Storage Conditions | Store in a dry, cool place, tightly sealed |
SAFETY / HANDLING
Use appropriate personal protective equipment (PPE) including mask and gloves.
Avoid inhalation of dust. Handle in well-ventilated areas.
Avoid contact with eyes and skin.
Store away from moisture and strong acids or alkalis.
Refer to the Safety Data Sheet (SDS) for detailed safety and first aid information.
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