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| Reference standard : Food & Pharmaceutical Grade | ||
| Items | Specifications | Results of test |
| Appearance | White powder | White powder |
| Identification | Conforms | Conforms |
| PH | 7.5~8.5 | 8.3 |
| Heavy metal % | ≤0.002% | 0.0003% |
| Chloride % | ≤0.01% | 0.003% |
| Sulfate % | ≤0.01% | 0.004% |
| Iron % | ≤0.01% | 0.001% |
| Reducing Substances | Conform | Conform |
| Assay % | 99.0%-100.5% | 99.2% |
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