CERTIFICATE OF ANALYSIS
L-THREONINE
BATCH NO: 200507013
MANUFACTURING DATE: NOV.11.2005
EXPIRY DATE: NOV.11.2008
| ITEM | SPECIFICATION | RESULT |
| 1. Appearance: | white crystal or crystalline powder | Conform |
| 2. Specific rotation: | -26.7 ~ -29.1 | -28 |
| 3. Chloride: | 0.05% Max. | 0.03% Max |
| 4. Ammonium: | 0.02%Max. | Conform |
| 5. Sulfate: | 0.03% Max. | Conform |
| 6. Iron: | 10ppm Max. | Conform |
| 7. Heavy metals: | 10ppm Max. | Conform |
| 8. Arsenic: | 1ppm Max. | 0.1ppm |
| 9. Other amino acid: | not detectable | Conform |
| 10. Loss on drying: | 0.2% Max. | 0.12% |
| 11. Residue on ignition: | 0.4% Max. | 0.220% |
| 12. Assay: | 99.0--101.0% | 99. 50% |
| 13. PH: | 5.0-6.5 | 5.8 |
| 14. Organic volatile impurities: | Meets the requirement | Conform |
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