CERTIFICATE OF ANALYSIS
L-CYSTEINE HCL ANHYDROUS
BATCH NO: 20060401
MANUFACTURING DATE: APR.01.2006
EXPIRY DATE: APR.01.2008
| ITEM | SPECIFICATION | RESULT |
| 1. Appearance: | white crystalline powder | Conform |
| 2. Identification: | Infrared absorption spectrum | Conform |
| 3. Specific rotation: | +5.7 ~ +6.8 | 6.2 |
| 4. Assay: | 98.5-101.5% | 99,75% |
| 5. Loss on drying: | 0.5% Max | 0,25% |
| 6. Residue on ignition: | 0.4%Max | 0,18% |
| 7. Heavy metals: | 10ppm Max | Conform |
| 8. Arsenic: | 1ppm Max | Conform |
| 9. State of solution: | Clear and colorless 98.0% min | 99,60% |
| 10. Other amino acids: | not detectable | Conform |
| 11. PH: | 1.5-2.0 | 1,65 |
| 12. Sulfate: | 0.03% Max | Conform |
| 13. Iron: | 10ppm Max | 5ppm Max |
| 14. Chloride: | 22.3-22.6% | 22,40% |
| 15. Organic volatile impurities: | Meet the requirements | Conform |
Produced by WIRUD Co.Ltd China