
| Items | Standard | Result | 
| Appearance | White crystalline powder | Conforms | 
| Assay | ≥97.0% | 99.5% | 
| Aqueous reaction | Comply with the standard | Conforms | 
| Appearance of solution | Comply with the standard | Conforms | 
| Water-insoluble | ≤0.02% | 0.01% | 
| Sulphates | ≤0.01% | 0.004% | 
| Ammonium | ≤0.002% | 0.001% | 
| Iron | ≤0.001% | 0.0003% | 
| Heavy metal | ≤0.0005% | 0.00018% | 
| Alkaline and alkaline earth metal | ≤0.2% | 0.1% | 
| Conclusion | The product conforms to USP | |






| Weight | Package | 
| <25KG | By foil-alum bag/pap/bottle | 
| ≥25kg | Package: 25kg/drum/bag or as your request | 










  
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