Ritonavir Impurity 61 CAS CATO-C4X-175161
| CAS No. | CATO-C4X-175161 |
| Molecular Formula | C37H44N2O3 |
| Molecular Weight | 564.76 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C37H44N2O3, Ritonavir Impurity 61 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 564.76 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a process- or degradation-related impurity, Ritonavir Impurity 61 (CAS CATO-C4X-175161, C37H44N2O3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
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.
Physical & Chemical Properties
| Molecular Formula | C37H44N2O3 |
| Molecular Weight | 564.76 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 | 2 |
Related Ritonavir Standards
- Ritonavir EP Impurity D (CAS 144142-33-6)
- Ritonavir EP Impurity H (CAS 1010809-43-4)
- Ritonavir EP Impurity F (CAS 1010809-61-6)
- Ritonavir Impurity A RRT 5.78 (CAS 959351-57-6)
- Ritonavir EP Impurity J (CAS 162849-95-8)
- Ritonavir EP Impurity K (CAS 1010809-39-8)
- Ritonavir EP Impurity B (CAS 765875-58-9)
- Ritonavir EP Impurity L (CAS 256328-82-2)
Recommended Standards
- Mianserin Impurity 85 (CAS CATO-C4X-136985)
- 4-Bromo-N,N-ditetradecylaniline (CAS 192937-53-4)
- Mianserin impurity 26 (CAS CATO-C4X-136926)
- tert-Butyl 7-(3-((tert-butyldiphenylsilyl)oxy)propyl)-5H-pyrido[4,3-b]indole-5-carboxylate (CAS 2267291-21-2)
- Ertapenem Impurity 4 (CAS CATO-C4X-16334)
- Ethacridine Impurity C53 (CAS 20304-70-5)
- Quetiapine EP Impurity W (CAS 1800608-95-0)
- Edoxaban Impurity 81 (CAS CATO-C4X-106381)
- 4-Fluoro-3-methoxy-5-methylphenylboronic acid (CAS 1451392-02-1)
- di-tert-Butyl ((2S,2'S)-(thiocarbonylbis(azanediyl))bis(propane-1,2-diyl))dicarbamate (CAS 922495-32-7)
- 5,6-Dihydro-4H-pyrrolo[1,2-b]pyrazole-2-carbaldehyde (CAS 623564-46-5)
- 4-(1-Isobutyl-1H-pyrazol-4-yl)piperidine (CAS 1443289-53-9)
- 2-(Bromomethyl)morpholin-3-one (CAS 2138232-60-5)
- Tirzepatide Impurity 36 (CAS CATO-C4X-324036)
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