Ritonavir Impurity 39 CAS CATO-C4X-175139
| CAS No. | CATO-C4X-175139 |
| Molecular Formula | C23H27N3O3S |
| Molecular Weight | N/A |
| 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 39 (CAS CATO-C4X-175139) is a certified pharmaceutical impurity reference standard with the molecular formula C23H27N3O3SHCl and a molecular weight of 462.00 g/mol.
Based on its molecular formula C23H27N3O3SHCl, Ritonavir Impurity 39 contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 462.00 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 | C23H27N3O3S HCl |
| Molecular Weight | 462.00 g/mol |
| Purity | >95% |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Ritonavir Standards
- Ritonavir EP Impurity C (CAS 1010808-43-1)
- Ritonavir EP Impurity K (CAS 1010809-39-8)
- Ritonavir EP Impurity H (CAS 1010809-43-4)
- Ritonavir Impurity 45 (CAS 1010809-50-3)
- Ritonavir Impurity 46 (CAS 1010809-54-7)
- Ritonavir EP Impurity F (CAS 1010809-61-6)
- Ritonavir Dehydro (CAS 1156504-13-0)
- Ritonavir-13C3 (CAS 1217673-23-8)
Recommended Standards
- Fasudil Impurity 55 (CAS 1578196-64-1)
- Lenvatinib Impurity 124 (CAS CATO-C4X-1140124)
- Venetoclax Impurity 17 (CAS CATO-C4X-249517)
- (S)-1-(3,5-dibromophenyl)but-3-en-1-amine (CAS 1269811-78-0)
- 2-Isopropoxy-6-(trifluoromethyl)pyrimidin-4(3H)-one (CAS 37836-80-9)
- 3-(4-(Tert-butyl)benzoyl)phenyl acetate (CAS 890099-86-2)
- 2-Chloro-1-(difluoromethyl)-3-methylbenzene (CAS 1261584-51-3)
- Roxadustat Impurity 156 (CAS CATO-C4X-2213156)
- Benzylpenicillin Impurity 25 (CAS CATO-C4X-189925)
- Xenopsin-Related Peptide 2 (XP-2) (H-9340.0005) (CAS 117442-29-2)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com