CAS No:77883-43-3
Shelf life:2 years
The detailed specifications are as below:
| Items | Standard | |
| Appearance | White or off white crystalline powder.odourless tasteless.lightly soluble in water,methanol soulution,soluble in mixed solution of 15 volume water and 35 volume tetrahydrofuran,almost unsoluble in acetone | |
| Identification(1) | The retention time of the main peak of the supplier should be consistent with the retention time of the control peak of doxazsin mesylate. | |
| Identification(2) | The infrared absorption spectra of this product should be consistent with the control map(spectral set 733) | |
| PH | 2.5～4.5 | |
| Cl- | ≤0.06% | |
| Related substance | Each impurity not more than 0.10% | |
| Sum of impurities not more than 0.3% | ||
| Methanol≤0.3% | ||
| Ethyl acetate≤0.5% | ||
| Organic solvent residue | N-butanol≤0.5% | |
| Toluene≤0.089% | ||
| Dichloromethane≤0.06% | ||
| Heavy metals | Not more than 10ppm | |
| Loss on drying | Not more than 1.0% | |
| Methyl methanesulfonate | Not more than 1900ppm(0.19%) | |
| Residue on ignition | ≤0.1% | |
| Assay | Not less than 98.0%～102.0%(dried substance) | |