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Quality indicators of flake copper oxide
| Chemical composition of copper oxide powder | % |
| Name | CuO 99% |
| Copper oxide（CuO） | ≥99 |
| chloride（Cl） | ≤0.005 |
| (Insoluble in Hcl） | ≤0.05 |
| sulfate（SO42-） | ≤0.01 |
| iron（Fe） | ≤0.01 |
| Total nitrogen content（N) | ≤0.005 |
| （soluble in water） | ≤0.01 |
| Particle size | 30-80目 |