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Contact Supplier| Analyte | O-Sill | O-Sil II | O-Sil III |
| SiO2 | 99.80% (±0.10%) | 99.40% (±0.20%) | 98.50%(±0.30%) |
| Al2O3 | 00.06% (±0.01%) | 00.20% (±0.10%) | 00.40% (±0.10%) |
| Fe2O3 | 00.01% (max) | 00.015% (max) | 00.10% (max) |
| K20 | 25 ppm (max) | 00.001% (max) | 00.20% (max) |
| Na20 | 40 ppm (max) | 00.001% (max) | 00.09% (max) |
| TiO2 | Nil | 00.001% (max) | 00.001% (max) |
| Lol@ 1000°C | 00.05% | 00.10% | 00.10% |