Silicon Metal Powder (441 / 553 Grade)
CAS 7440-21-3
Si
Metal Powder
MW: 28.09 g/mol
Physical & Chemical Specifications
| Property | Specification | Test Method |
|---|
| Grade | 441 / 553 | — |
| Silicon (Si) – 441 | ≥ 99.0% | ICP-OES |
| Silicon (Si) – 553 | ≥ 98.5% | ICP-OES |
| Iron (Fe) | ≤ 0.4% (441) / ≤ 0.5% (553) | ICP-OES |
| Aluminum (Al) | ≤ 0.4% (441) / ≤ 0.5% (553) | ICP-OES |
| Calcium (Ca) | ≤ 0.1% (441) / ≤ 0.3% (553) | ICP-OES |
| Particle Size (Powder) | –100 mesh to –325 mesh | ASTM B214 |
| Forms Available | Lump, Ingot, Powder | — |
Typical Applications
- Aluminum-silicon (Al-Si) alloy production
- Polysilicon & solar-grade silicon raw material
- Silicone rubber & silane coupling agent synthesis
- Refractory & abrasive materials
- Chemical vapor deposition (CVD) target
Packaging
25 kg / 50 kg woven bags; bulk container on request
Storage & Shelf Life
Keep dry. Avoid strong alkalis & HF. Shelf life: 36 months.
All values are typical and may vary by lot. This TDS does not constitute a warranty.
Contact TKNCO for lot-specific Certificate of Analysis (COA).