Ritonavir Impurity 59 CAS CATO-C4X-175159
| CAS No. | CATO-C4X-175159 |
| Molecular Formula | C19H22N2O2 |
| Molecular Weight | 310.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Ritonavir Impurity 59 (CAS CATO-C4X-175159), a pharmacopoeial impurity reference standard (molecular formula C19H22N2O2, MW 310.39 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, Ritonavir Impurity 59 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 310.39 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
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 | C19H22N2O2 |
| Molecular Weight | 310.39 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related Ritonavir Standards
- Ritonavir EP Impurity A (CAS 154212-61-0)
- Ritonavir Impurity N16 (CAS 183246-46-0)
- Ritonavir Impurity 54 (CAS CATO-C4X-175154)
- Ritonavir Impurity 52 (CAS CATO-C4X-175152)
- Ritonavir Impurity 53 (CAS CATO-C4X-175153)
- Ritonavir Impurity N11 (CAS 2519851-81-9)
- Ritonavir Diamino Alcohol Impurity (CAS 144163-44-0)
- Ritonavir Impurity 58 (CAS 172720-22-8)
Recommended Standards
- 2,2 '- [Carbonyl bis (thio)] diethylsulfonic acid (CAS 1110813-35-8)
- Peramivir impurity 107 (CAS CATO-C4X-1833107)
- Cetirizine Impurity 35 (CAS CATO-C4X-158235)
- Peramivir Impurity 76 (CAS CATO-C4X-183376)
- Ruxolitinib Impurity 118 (CAS CATO-C4X-2058118)
- Vortioxetine Impurity 76 (CAS CATO-C4X-105676)
- Gimeracil Impurity 6 (CAS 529-19-1)
- 2-(Trifluoromethyl)-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidin-4(1H)-one (CAS 647862-98-4)
- N-(Benzenesulfonyl)-2-[(1-phenyl-1H-1,2,4-triazol-3-yl)oxy]ethanimidamide (CAS 338405-35-9)
- 6'-Butyl-3',4'-dihydro-8'h-spiro[cyclohexane-1,2'-pyrano[3,2-g]chromene]-8'-thione (CAS 1133822-72-6)
- tert-Butyl 3-[(3-phenylpropyl)amino]propanoate (CAS 393154-28-4)
- 4-Butoxy-2,6-difluorobenzoic acid (CAS 123843-56-1)
- 5-Chloro-2-hydroxyphenyl benzoate (CAS 5876-98-2)
- (Des-Thr?)-Glucagon trifluoroacetate salt (CAS 1802078-27-8)
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