Atorvastatin Impurity 166 CAS CATO-C4X-1132166
| CAS No. | CATO-C4X-1132166 |
| Molecular Formula | C33H33FN2O6 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 612.71 g/mol gives Atorvastatin Impurity 166 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Atorvastatin Impurity 166 (CAS CATO-C4X-1132166, C33H33FN2O6Ca) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C33H33FN2O6Ca, Atorvastatin Impurity 166 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 612.71 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), Atorvastatin Impurity 166 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 | C33H33FN2O6 Ca |
| Molecular Weight | 612.71 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Atorvastatin Standards
- Atorvastatin Impurity 22 (CAS 1035205-25-4)
- Atorvastatin Calcium Propylene Glycol Solvate (CAS 1040350-07-9)
- Atorvastatin Lactone Diepoxide (CAS 1046118-40-4)
- Atorvastatin Lactam calcium Salt Impurity (CAS 1046118-41-5)
- Atorvastatin Impurity 86 (CAS 1046118-44-8)
- Atorvastatin Impurity 141 Calcium Salt (CAS 1046378-58-8)
- Atorvastatin Impurity 76 (CAS 1099474-28-8)
- Atorvastatin EP Impurity F(Calcium Salt) (CAS 1105067-87-5)
Recommended Standards
- Relugolix Impurity 106 (CAS CATO-C4X-2429106)
- Repaglinide Impurity 15 (CAS 88709-17-5)
- Oryzanol Impurity 1 (CAS 545386-92-3)
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- (4AR,8aR)-1-ethoxy-5-methyl-4,4a,8,8a-tetrahydroisoquinolin-3(7H)-one (CAS 122490-25-9)
- 2-(3-Aminopiperidin-1-yl)-6-ethylpyrimidin-4(3H)-one (CAS 1708428-19-6)
- 1-(4-Chloro-3-methylphenoxy)-3-(4-methylpiperazin-1-yl)propan-2-ol hydrochloride (CAS 1211504-33-4)
- 3-[1-(2-carbamoylethyl)-3-(4-chlorophenyl)-1h-pyrazol-4-yl]-2-cyanoprop-2-enoic acid (CAS 1006493-20-4)
- 5-(Tert-butyl)-7-chloro-3-(4-fluorophenyl)-2-methylpyrazolo[1,5-a]pyrimidine (CAS 1383626-16-1)
- Influenza PR8 Hemagglutinin Peptide (110-119) (H-6312.0005) (CAS 132031-50-6)
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