Lopinavir EP Impurity S CAS 943250-65-5
| CAS No. | 943250-65-5 |
| Molecular Formula | C47H58N4O7 |
| Molecular Weight | 790.99 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Lopinavir EP Impurity S 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.
CATO supplies Lopinavir EP Impurity S (CAS 943250-65-5), a pharmacopoeial impurity reference standard (molecular formula C47H58N4O7, MW 790.99 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C47H58N4O7, Lopinavir EP Impurity S contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 790.99 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
Physical & Chemical Properties
| Molecular Formula | C47H58N4O7 |
| Molecular Weight | 790.99 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 21.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 4 |
Related Lopinavir Standards
- Lopinavir EP Impurity R (CAS 943250-66-6)
- Lopinavir EP Impurity O (CAS CATO-C4X-168215)
- Lopinavir Impurity 2 (CAS CATO-C4X-168222)
- Lopinavir EP Impurity D (CAS CATO-C4X-16824)
- Lopinavir EP Impurity T (CAS 1797024-56-6)
- Lopinavir Impurity 3 (CAS CATO-C4X-168221)
- Lopinavir EP Impurity C (CAS CATO-C4X-168229)
- Lopinavir Metabolite M-3/M-4 (CAS 221553-72-6)
Recommended Standards
- Gadobutrol Impurity 35 (CAS 52667-88-6)
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