Atorvastatin Impurity 40 CAS CATO-C4X-113240
| CAS No. | CATO-C4X-113240 |
| Molecular Formula | C51H66FN3O7 |
| Molecular Weight | 852.08 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 process- or degradation-related impurity, Atorvastatin Impurity 40 (CAS CATO-C4X-113240, C51H66FN3O7) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C51H66FN3O7, Atorvastatin Impurity 40 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 852.08 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).
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 | C51H66FN3O7 |
| Molecular Weight | 852.08 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 20.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
Related Atorvastatin Standards
- Atorvastatin Impurity 78 (CAS 1116118-82-1)
- Atorvastatin Impurity 73 (CAS CATO-C4X-113273)
- Atorvastatin Impurity 57 (CAS 425408-16-8)
- Atorvastatin Acyl-beta-D-glucuronide (CAS 463962-58-5)
- Atorvastatin EP Impurity F (CAS 1371615-56-3)
- Atorvastatin Calcium EP Impurity F (CAS 887196-24-9)
- Atorvastatin Impurity 67 (CAS 693793-87-2)
- Atorvastatin 3-Isopropyl Ether tert-Butyl Ester (CAS 1797009-04-1)
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