| 外觀 | A white or almost white, crystalline powder or colourless crystals. |
| Solubility | Freely soluble in water,practically insoluble in alcohol. |
| Identification test (A,B) | Up to the STANDARD |
| Appearance of solution | Clarity of solution:5% water solution should be clear |
| Colour of solution:5% water solution should be not more intensively coloured than reference solution BY6 | |
| Specific optical rotation | +14.0° to +16.0° |
| Assay | 98.5-101.0% |
| Chlorides | 200ppm max |
| Sulphates | 300ppm max |
| Ammonium | 200ppm max |
| Iron | 10ppm max |
| 重金屬 | 10ppm max |
| 乾燥損失 | 0.5% max |
| Sulphated ash | 0.1% max |
| Ninhydrin-positive substances (TLC) | Up to the STANDARD |
serine
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