| #1101 | #2202 | #3303 | #3305 | #441 | #553 | |
| Si | 99 | 99 | 99 | 99 | 99 | 98.5 |
| Fe | 0.1 | 0.2 | 0.3 | 0.3 | 0.4 | 0.5 |
| Al | 0.1 | 0.2 | 0.3 | 0.3 | 0.4 | 0.5 |
| Ca | 0.01 | 0.02 | 0.03 | 0.05 | 0.1 | 0.3 |
| P | 0.003 | 0.003 | 0.003 | 0.004 | 0.004 | 0.004 |
| Ni | 0.03 | 0.03 | 0.03 | / | / | / |
| Mn | 0.03 | 0.03 | 0.03 | / | / | / |
| Ti | 0.02 | 0.02 | 0.03 | 0.03 | / | / |