Bosentan is a mixed endothelin receptor antagonist which is used as a vasodilator. Bosentan is an inhibitor of ETAR and ETBR.
Specification:
| Analysis Test | Specification | Result |
| Description | white crystalline powder | Conforms |
| Solubility | Easily soluble in water, unsoluble in ethanol | Conforms |
| PH | 6.0-7.5 | 6.9 |
| Solution clarity and color | solution should be clear and colorless | Conforms |
| Related substances | CMP 0.3%
Simple impurity Total other impurity | 0.01%
0.03% 0.10% |
| Chloride | 0.05% | Conforms |
| Ammonium | 0.05% | Conforms |
| Fe | 0.01% | Conforms |
| Phosphate | 0.1% | Conforms |
| Loss on drying | <6.0% | 1.3% |
| Heavy metals | 0.002% | Conforms |
| Arsenide | 0.0001% | Conforms |
| Bacterial Endotoxins | 0.3EU/mg | Conforms |
| Microbial Limit | Conforms | Conforms |
| Assay(on dried basis) | >98.0% | 98.8% |
Packaging details:
| Packaging details: | 25kg/drum with double plastic bags inside; packed in a cardboard drum or fiber HDPE drum. |
| Storage: | Stored in a clean, cool, dry area; keep away from moisture and strong, direct light/heat |
| Shelf Life: | 5 years if sealed and store away from direct sun light. |

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