Liothyronine EP Impurity A-13C9-15N CAS 1431868-11-9
| CAS No. | 1431868-11-9 |
| Molecular Formula | C7[13C]8H11I4NO4 |
| Molecular Weight | 784.81 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 784.81 g/mol gives Liothyronine EP Impurity A-13C9-15N distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Liothyronine EP Impurity A-13C9-15N (CAS 1431868-11-9) is a certified pharmaceutical impurity reference standard with the molecular formula C7[13C]8H11I4NO4 and a molecular weight of 784.81 g/mol.
Based on its molecular formula C7[13C]8H11I4NO4, Liothyronine EP Impurity A-13C9-15N contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, iodine substitution; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 784.81 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), Liothyronine EP Impurity A-13C9-15N 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 | C7[13C]8H11I4NO4 |
| Molecular Weight | 784.81 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | I-containing |
| Nitrogen Atoms | 1 |
Related Liothyronine Standards
- Liothyronine EP Impurity A (CAS 51-48-9)
- Liothyronine Impurity 2 (CAS 1217733-23-7)
- rac-Liothyronine-15N-13C9 (CAS CATO-C4X-21313)
- Liothyronine related impurity, (R)-2-amino (CAS 5714-08-9)
- Liothyronine Impurity N1 (CAS 92151-30-9)
- Liothyronine Impurity 4 (CAS CATO-C4X-21314)
- Liothyronine Impurity 5 (CAS 4299-64-3)
- Liothyronine EP Impurity B (CAS 300-39-0)
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