| Appearance | White or almost white,fine or granular powder. |
| Identification A | Conform |
| Identification B | The degree of Polymerization≤350 |
| Granulometry |
Remains 60 mesh
≥
10%
Remains 100 mesh ≥ 50% |
| Conductivity | ≤75us/cm |
| PH value | 5.0-7.5 |
| Loss on drying | ≤7.0% |
| Residue on ignition | ≤0.10% |
| Water Soluble Substances | ≤0.25% |
| Ether-Soluble Substances | ≤0.05% |
| Bulk density | 0.32-0.45g/ml |