N-Acetyl-L-Tyrosine
| Test Items | Specifications |
| Appearance | White Crystalline Powder |
| Specific Rotation [a]D20 | +46.5' ~ +49.0 |
| Color & Clarity of Solution | Colorless and Clear |
| Melting Range | About 149'C |
| Chloride (Cl) | Less Than 0.02% |
| Ammonium (NH4) | Less Than 0.02% |
| Sulfate (SO4) | Less Than 0.02% |
| Iron (Fe) | Less Than 30 ppm |
| Heavy Metals (as Pb) | Less Than 10 ppm |
| Loss on Drying | Less Than 0.5% |
| Residue on Ignition | Less Than 0.1% |
| Assay | 99.0 ~ 101.0% |
| Other Substance | To Pass Test |
| pH | 1.5 ~ 3.0 |