| Limit | |
| Assay: | 98.0-102.0% |
| Insoluble Matter: | 0.01% max. |
| Cobalt: | 0.015% max. |
| Manganese: | 0.002% max. |
| Iron: | 10 ppm max. |
| Copper: | 10 ppm max. |
| Chloride: | 0.001% max. |
| Zinc: | 0.001% max. |
| Calcium and Magnesium: | 0.02% max. |
| Chromium: | 0.001% max. |
| Heavy Metals(as Pb): | 0.001% max. |
| Potassium: | 0.01% max. |
| Sodium: | 0.05% max. |