CAS number： 73-32-5
Molecular formula： C6H13NO2
molecular weight： 131.17
Chemical structure：
| Product name | L-Isoleucine | |
| Shelf Life | 2 Years | |
| Items | Limits | Test results |
| Description | White crystals or crystalline powder | Conforms |
| Identification（IR） | Concordant with the reference spectrum | Conforms |
| Assay | 98.5～101.5% | 98.63% |
| PH | 5.5～7.0 | 6.58 |
| Specific rotation | +38.9°～+41.8° | +40.46° |
| Loss on drying | ≤0.30% | 0.08% |
| Residue on ignition | ≤0.30% | 0.06% |
| Chloride（Cl） | ≤0.05% | ＜0.05% |
| Iron（Fe） | ≤30ppm | ＜30ppm |
| Sulfate（SO4） | ≤0.03% | ＜0.03% |
| Arsenic(As) | ≤1.5ppm | ＜1.5ppm |
Heavy metals | ≤15ppm | ＜15ppm |
| Organic volatile impurities | Meet the requirements | Conforms |
| Conclusion：Passed test according to the Standard of USP24 | ||
