Methylnaltrexone Bromide Impurity 9 CAS CATO-C4X-15219
| CAS No. | CATO-C4X-15219 |
| Molecular Formula | C22H28NO4 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Methylnaltrexone Bromide Impurity 9 (C22H28NO4Br) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 450.37 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Methylnaltrexone Bromide Impurity 9 (CAS CATO-C4X-15219) is a certified pharmaceutical impurity reference standard with the molecular formula C22H28NO4Br and a molecular weight of 450.37 g/mol.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Methylnaltrexone Bromide Impurity 9 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C22H28NO4 Br |
| Molecular Weight | 450.37 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
Related Methylnaltrexone Standards
- Methylnaltrexone Bromide Impurity 4 (CAS 1005410-32-1)
- Methylnaltrexone Bromide Impurity 1 (CAS 1027638-96-5)
- Methylnaltrexone Bromide - API Standards (CAS 916055-92-0)
- Methylnaltrexone (CAS 916055-93-1)
- Methylnaltrexone Bromide Impurity 25 (CAS CATO-C4X-147525)
- Methylnaltrexone Bromide Impurity 10 (CAS CATO-C4X-152110)
- Methylnaltrexone Bromide Impurity 11 (CAS CATO-C4X-152111)
- Methylnaltrexone Bromide Impurity 12 (CAS CATO-C4X-152112)
Recommended Standards
- Eltrombopag Impurity 122 (CAS CATO-C4X-1198122)
- Cinacalcet Impurity 13 (CAS 2074615-22-6)
- Pilocarpine Impurity 9 (CAS CATO-C4X-24019)
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