| Results | Limits | |
| Assay: | 99.9% as CuBr2 | 99% min. |
| pH of 5% soln. at 25°C: | 3.70 | 2.5 - 4.5 |
| Insoluble matter: | < 0.005% | 0.01% max. |
| Chloride: | < 0.1% | 0.3% max. |
| Sulfate: | < 0.01% | 0.01% max. |
| Substances not precipitated by Hydrogen Sulfide: | < 0.005% | 0.2% max. |
| Iron: | 0.0005% | 0.005% max. |