Pitavastatin Impurity 91 CAS CATO-C4X-103791
| CAS No. | CATO-C4X-103791 |
| Molecular Formula | C19H14FNO |
| Molecular Weight | 291.32 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Pitavastatin Impurity 91 (CAS CATO-C4X-103791, C19H14FNO) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Pitavastatin Impurity 91 (C19H14FNO) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), Pitavastatin Impurity 91 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.
Physical & Chemical Properties
| Molecular Formula | C19H14FNO |
| Molecular Weight | 291.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Pitavastatin Standards
- Pitavastatin Impurity 25 (CAS CATO-C4X-103725)
- Pitavastatin Formyl Impurity (CAS 121660-37-5)
- Pitavastatin Impurity 55 (CAS 1187966-94-4)
- Pitavastatin Hydroxymethyl Impurity (CAS 24922-02-9)
- Pitavastatin Impurity 81 (CAS CATO-C4X-103781)
- Pitavastatin Impurity 96 (CAS 121660-11-5)
- Pitavastatin Impurity 54 (CAS 1187966-95-5)
- Pitavastatin Impurity 97 (CAS 1356998-79-2)
Recommended Standards
- Febuxostat impurity 129 (CAS CATO-C4X-1162105)
- Tert-butyl (3,3-difluoro-1-(1,3,4-thiadiazol-2-yl)cyclobutyl)carbamate (CAS 2375238-60-9)
- Febuxostat Impurity 2 (CAS CATO-C4X-11622)
- rel-(1R,3R,4R)-Ethyl 1-((tert-butoxycarbonyl)amino)-3-fluoro-4-hydroxycyclopentanecarboxylate (CAS 2488653-68-3)
- Cefminox Impurity 36 (CAS CATO-C4X-192636)
- Posaconazole Impurity 196 (CAS CATO-C4X-1208196)
- Glycerol Impurity 49 (CAS CATO-C4X-217149)
- 6-(tert-Butyl)-2-(methylthio)-4-(trifluoromethyl)nicotinonitrile (CAS 893752-77-7)
- 1,4-Bis(2-bromoethynyl)benzene (CAS 65127-72-2)
- Carboxyamidotriazole Impurity 4 (CAS 4342-08-9)
- Argatroban Impurity 3 (CAS 20668-20-6)
- ethyl 2-(methylthio)-4-(piperidin-1-yl)pyrimidine-5-carboxylate (CAS 100451-24-9)
- 2-Cyano-N-[(1,3-thiazol-4-yl)methyl]acetamide (CAS 1495694-03-5)
- Tirzepatide Impurity 43 (CAS CATO-C4X-324043)
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