Items | Standard |
Characteristics | A white crystalline powder or colourless crystals or white pearls,freely soluble in water.Practically insoluble in alcohol. |
Identification | Positive |
Loss on drying | ≤ 0.5% |
Acidity/alkalinity | Conform |
Appearance of solution | Conform |
Arsenic | ≤ 0.0001% |
Barium | Conform |
Iron | ≤ 0.002% |
Magnesium and alkaline-earth metals | ≤ 0.01% |
Bromides | ≤ 0.005% |
Iodides | Conform |
Sulphate | ≤ 0.02% |
Heavy metals | ≤ 0.0005% |
Aluminium | ≤ 0.00002% |
Ferrocyanides | Conform |
Phosphates | ≤ 0.0025% |
Nitrites | The absorbance is not more than 0.01 |
Bacterial endotoxins | ≤ 5IU/g |
Microbial limit | ≤ 100cfu/g |
Assay | 99.0%~100.5% |