| Items | Specification |
|
Appearance 外 观 |
White crystal powder 白色结晶粉末 |
| Assay（NH4）2S2O8）主含量 | ≥98.5％ |
| Heavy metal (as Pb)重金属(Pb) | ≤0.0005％ |
| Iron（Fe）铁 | ≤0.0005％ |
| Manganese（Mn）锰 | ≤0.00005％ |
| Residue after ignition灼烧残渣 | ≤0.02％ |
| Free acid (as H2SO4)游离酸(H2SO4) | ≤0.10％ |
| Active oxygen活性氧 | ≥6.90％ |
| Moisture水分 | ≤0.10％ |
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