性状 (characters) |
无色针状结晶 ( colorless needle crystal) |
合格 (conform) |
含量 (assay) |
99.5% |
99.6% |
澄清度实验 (appearance of solution) |
合格 (conform) |
合格 (conform) |
水不溶物 (water insoluble substance) |
0.003% |
0.0015% |
硝酸盐 (nitrites) |
合格 (conform) |
合格 (conform) |
钙 (calcium) |
0.03% |
0.01% |
铁 (iron) |
0.001% |
0.0008% |
钡 (barium) |
0.02% |
0.01% |
重金属 (heavy metal) |
1.2% |
0.3% |
碱金属及镁 (magnesium and alkali) |
0.01% |
0.006% |