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| Items | Standard |
| Strength (Percent of the standard) | 100 |
| Shade (As the standard) | Approximate |
| Moisture(%)≤ | 5.0 |
| Insoluble matter in sodium sulfide(%)≤ | 2.0 |
| Particle size (Residue content after filtrated by 180μm sifter) % ≤ |
5.0 |
| Harmful aromatic amines (mg/kg) | Up to standard of GB 19601 |
| Heavy metal element (mg/kg) | Up to standard of GB 20814 |
Apperance: Blue-gray Power.
Package: In 25KG Plastic Woven Bag / Kraft Bag.
