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1. Identification: Infrared absorption
2. Specific rotation[a]25°: -32.7°~34.7°
3. PH: 5.0~6.5
4. Loss on drying: ≤ 0.2%
5. Residue on ignition: ≤0.4%
6. Chlride: ≤0.05%
7. Sulfate: ≤0.03%
8. Iron: ≤0.003%
9. Heavy metals: ≤0.0015%
10. Organic volatile impurities: meets the requirements
11. Assay: 98.5~101.5%
Phenylalanine