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Item |
Limit |
Result |
Description |
White crystals or crystalline powder |
Conforms |
Identification |
Infrared absorption |
Conforms |
Specific rotation[a]D25° |
+26.6°~ +28.8° |
+27.59° |
PH |
5.5 ~ 7.0 |
6.21 |
Loss on drying |
≤0.3% |
0.19% |
Residue on ignition |
≤0.1% |
0.08% |
Chloride |
≤0.05% |
<0.05% |
Sulfate |
≤0.03% |
<0.03% |
Iron |
≤0.003% |
<0.003% |
Heavy metals |
≤0.0015% |
<0.0015% |
Organic volatile impurities |
Meets the requirements |
Conforms |
Assay |
98.5 ~ 101.5% |
99.55% |
Conclusion: The test result of the above mentioned product meets USP24 standard. |
d sulfuric acid
.
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