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Items | Specification | Test Results |
Appearance | White crystal powder | Conforms |
Assay | ≥99.5% | 99.96% |
Identification | IR | Conforms |
Melting point | 168-172℃ | 170.6-171.8℃ |
Solubility (40% aqueous solution) | Colorless and clear | Conforms |
Heavy metal | ≤5ppm | Conforms |
Moisture | ≤0.6% | 0.3% |
PH (5% aqueous solution) | 10.0-11.5 | 10.68 |
Fe | ≤1ppm | Conforms |
SO4 | ≤10ppm | Conforms |
Cl | ≤3ppm | Conforms |
Ultraviolet absorbance: 280nm (40% aqueous solution) |
≤0.07 | 0.067 |
Ultraviolet absorbance: 400nm (40% aqueous solution) |
≤0.02 | 0.009 |
Conclusion | Conforms to Factory Standard |
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