Chemical composition
| ELEMENTS | VALUE | ELEMENTS | VALUE | ||
| Copper | Cu | 99.97% Min. | Silica | Si | 0.3ppm Max. |
| Cobalt | Co | 0.2ppm Max. | Bismuth | Bi | 0.1ppm Max. |
| Lead | Pb | 0.2ppm Max. | Tellurium | Te | 0.05ppm Max. |
| Iron | Fe | 2ppm Max. | Silver | Ag | 10ppm Max. |
| Aluminum | Al | 0.5ppm Max. | Se | 0.3ppm Max. | |
| Manganese | Mn | 0.1ppm Max. | S | 4ppm Max. | |
| Nickel | Ni | 0.2ppm Max. | MG | 0.4ppm Max. | |
| Antimony | Sb | 0.1ppm Max. | O2 | 0 | |
| AS | 0.1ppm Max. | – |