CAS NO.: 138-15-8
| Test Items | Limit |
| Molecular Structure | ![]() |
| Appearance | White crystalline power |
| Identification | As per FCC IV(chemical examine) |
| Specific rotation [a]D20° | +25.2°~+25.8° |
| Loss on drying | ≤0.50% |
| Residue on ignition | ≤0.25% |
| Lead | ≤10mg/kg |
| Heavy metals(Pb) | ≤0.002% |
| Assay | >98.5% |