| Producer | Cu (%) | Zn (%) | Al (%) |
| SUD CHEMIE | 65 - 75 | 18 - 23 | 5 - 10 |
| BASF | 65 - 75 | 20 - 30 | 5 - 10 |
| DUPONT | 61 | 30 | 9 |
| HALDOR TOPSOE | 50 - 60 | 21 - 25 | 15 - 28 |