45 µm Particle Size, Low Dust, Easy-to-Handle Rubber & Industrial Precipitated Silica
SI-175 is a precipitated silica with an average particle size of around 45 µm. It generates little dust and has excellent flowability, making it ideal for large-scale automatic weighing and mixing processes. It is used in various fields including rubber reinforcement, feed-additive carriers, and industrial fillers.
Key Features
- 🧱 Synthetic Amorphous SiO₂ — Pure white amorphous powder produced by reacting soluble silicate with acid
- 🧪 High-Purity Management — SiO₂ ≥ 98–99%, with strict control of harmful components such as heavy metals, lead, and arsenic
- ⚙️ Porous Structure — High specific surface area and oil absorption deliver reinforcement, thickening, matting, and adsorption performance
- 🌿 Wide Applications — Applied across industries: rubber, paint, plastics, food/pharma, toothpaste, cosmetics, and more
Technical Specifications
| Item | Value |
|---|---|
| Form | White powder |
| Whiteness | 97 – 98 |
| SiO₂ (Dry Basis) | ≥ 98% |
| pH | 6.5 – 7.5 |
| DBP Oil Absorption | 230 – 260 ml/100g |
| Particle Size | 45 µm |
| Bulk Density | 230 – 250 g/L |
| Loss on Drying (105℃, 2 hr) | 4.0 – 6.0 % |
| Ignition Loss (1000℃, 2 hr) | 3.0 – 5.0 % |
| Soluble Salts (Na₂SO₄) | ≤ 1.5 % |
| Lead Content (Pb) | ≤ 0.0005 % |
| Heavy Metals | ≤ 0.003 % |
| Arsenic Content (As) | ≤ 0.0003 % |
| Package | 20 kg / bag |
| Country of Origin | China |
Main Applications
Precipitated Silica
Particle size, purity, surface treatment and packaging can be customized to your specification. Contact us for samples, TDS and quotations.