| ITEM | SPECIFICATION |
| Assay (after drying) | ≥98.0% |
| Loss on Drying（105℃,1h） | ≤1% |
| Sulfate (SO4) | ≤0.05% |
| PH (10% W/V) | 5.5-7.0 |
| Arsenic | ≤0.0001% |
| Heavy Metals (as Pb) | ≤0.001% |
| Cyclohexylamine（环己胺） | ≤0.0025% |
| Dicyclohexylamine（双环己胺） | Conforms |
| Transparency（100g/L） | ≥95% |
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