| Items | Specifications |
| Acid-consuming | Consume 0.1mol/L HCL≥100ml/g |
| Free alkali | Consume0.1mol/L HCL≤1.0ml/g |
| Chloride | ≤0.05% |
| Sulfates | ≤0.5% |
| Soluble salts | ≤1.5% |
| Heavy metals | ≤0.004% |
| Arsenic | ≤0.0004% |
| Loss on Ignition | 17.0%-34.0% |
| MgO | ≥20.0% |
| SiO2 | ≥45.0% |
| SiO2/ MgO | 2.10-2.37 |
