CAS No:21187-98-4
Shelf life:5 years
The detailed specifications are as below:
| Items | Standard |
| Characteristics | A white or almost white powder |
| Solubility | Practically insoluble in water;freely soluble in dichloromethane;sparingly soluble in acetone;slightly soluble in alcohol. |
| Identification | The infrared absorption spectrum is concordant with the reference spectrum |
| Impurity B | ≤2ppm |
| Related substances | Impurity F≤0.15% |
| Other individual impurity≤0.10% | |
| Total unknown impurity≤0.20% | |
| Loss on drying | ≤0.25% |
| Sulphated ash | ≤0.1% |
| Residual solvents | Ethyl acetate NMT 2500ppm |
| Toluene NMT 890ppm | |
| Ethanol NMT 5000ppm | |
| THF NMT 720ppm | |
| Assay | 99.0%-101.0% |