Complaint
| Package | carton drum with two plastic bags inside |
| Net weight | 25KG/Drum |
| Storage | Sealed in cool and dry place to avoid moisture and light |
| Shelf life | 2 years when properly stored |
| Lead time | 1~3 days after confirmation |
| Test Items | Test Standards |
| Appearance | White to off-white powder |
| Identification | IR |
| The retention time of the major peak of the sample solution corresponds to that of the standard solution, as obtained in assay | |
| Optical rotation | -160°~-167° |
| Loss on drying | ≤0.5% |
| Residue on ignition | ≤0.1% |
| Heavy metals(Pb) | ≤20ppm |
| Organic impurities | Levodopa related compound Aa≤0.1% |
| L-Tyrosine≤0.1% | |
| Levodopa related compound B≤0.5% | |
| L-Veratrylglycineb≤0.1% | |
| Any unspecified impurity ≤0.1% | |
| Total impurities≤1.1% | |
| Assay | 98.0%~102.0%(on dried basis) |
