Ritonavir impurity 48 CAS CATO-C4X-175148
| CAS No. | CATO-C4X-175148 |
| Molecular Formula | C37H48N6O5S2 |
| Molecular Weight | 720.94 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Ritonavir impurity 48 (CAS CATO-C4X-175148) is a certified pharmaceutical impurity reference standard with the molecular formula C37H48N6O5S2 and a molecular weight of 720.94 g/mol.
Based on its molecular formula C37H48N6O5S2, Ritonavir impurity 48 contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 720.94 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C37H48N6O5S2 |
| Molecular Weight | 720.94 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) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 2 |
Related Ritonavir Standards
- Ritonavir (CAS 155213-67-5)
- Ritonavir Geo-isomer (CAS 959315-21-0)
- Ritonavir EP Impurity N (CAS 202816-62-4)
- Ritonavir EP Impurity O (CAS 1414933-81-5)
- Ritonavir EP Impurity Q (CAS 1414933-82-6)
- Ritonavir EP Impurity R (CAS 1414933-80-4)
- Ritonavir Impurity 56 (CAS CATO-C4X-175156)
- Ritonavir Dehydro (CAS 1156504-13-0)
Recommended Standards
- Nonacyclo[43.3.1.13,7.19,13.115,19.121,25.127,31.133,37.139,43]hexapentaconta-1(49),3,5,7(56),9,11,13(55),15,17,19(54),21,23,25(53),27,29,31(52),33,35,37(51),39,41,43(50),45,47-tetracosaene (CAS 82040-66-2)
- O-(2-(1,2-Dihexanoyl-3-(7-oxo-11-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)undecanoyl)triazyl)ethyl) methanesulfonothioate (CAS 1322625-00-2)
- 799812-76-3 (2R)-2,3-Bis(hexadecanoyloxy)propyl 3,4,5-trihydroxybenzoate DTXSID70677182 (CAS 799812-76-3)
- 9,9'-(9,9-Dioctyl-9H-fluorene-2,7-diyl)bis(9H-carbazole) (CAS 848900-30-1)
- Dotinurad Impurity 226 (CAS CATO-C4X-2494226)
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- 3-(((1-Methyl-1H-pyrazol-5-yl)methyl)amino)azepan-2-one (CAS 1218574-72-1)
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- Efinaconazole Impurity G (CAS 109105-86-4)
- Semaglutide impurity 99 (CAS CATO-C4X-222699)
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