| Product name | L-Leucine |
| Item | Specification (USP25) |
| Specific rotation | + 14.9º- +17.3º |
| Chloride (Cl) | 0.05% Max. |
| Sulfate (SO4) | 0.03% Max. |
| Iron (Fe) | 30 ppm Max. |
| Heavy metals (Pb) | 15 ppm Max. |
| Loss on drying | 0.2% Max. |
| Residue on ignition | 0.4% Max. |
| Assay | 98.5-101.5% |
| PH | 5.5-7.0 |
| Organic volatile impurities | Meets the requirements |