性状 (characters) |
无色结晶或白色结晶性粉末 (colorless crystal or white crystalline powder) |
合格 (conform) |
含量 (assay) |
99.0% |
99.5% |
ph (ph) |
5.0~6.5 |
5.8 |
澄清度实验 (appearance of solution) |
应符合规定 (comply with the standard) |
合格 (conform) |
乙醇溶解实验 (ethanol dissolution experiments) |
应符合规定 (comply with the standard) |
合格 (conform) |
水不溶物 (water-insoluble) |
0.01% |
0.007% |
钠 (sodium) |
0.002% |
0.001% |
钾 (potassium) |
0.003% |
0.001% |
钙 (calcium) |
0.001% |
0.0008% |
铁 (iron) |
0.001% |
0.0008% |
硅 (silicon) |
0.001% |
0.0003% |
重金属 (heavy metal) |
0.001% |
0.0008% |