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| Item | Quality |
|---|---|
| Appearance | White crystal |
| Content (dry good meter) | 99.0-102.0% |
| PH | 6.0-7.0 |
| Water insoluble | ≤0.005% |
| Sulfate | ≤0.01% |
| Heavy mental(as Pb) | ≤0.002% |
| Chloride | ≤0.005% |
| Arsenic | ≤3ppm |
| Organic volatiles | Pass the test |
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