Azilsartan Impurity 166 CAS CATO-C4X-1096166
| CAS No. | CATO-C4X-1096166 |
| Molecular Formula | C27H23N5O6 |
| Molecular Weight | 513.50 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 513.50 g/mol gives Azilsartan Impurity 166 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Azilsartan Impurity 166 (CAS CATO-C4X-1096166) is a certified pharmaceutical impurity reference standard with the molecular formula C27H23N5O6 and a molecular weight of 513.50 g/mol.
Azilsartan Impurity 166 (C27H23N5O6) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
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 | C27H23N5O6 |
| Molecular Weight | 513.50 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
Related Azilsartan Standards
- Azilsartan Impurity 103 (CAS CATO-C4X-1096103)
- Azilsartan Impurity 79 (CAS 1613135-56-0)
- Azilsartan Impurity 160 (CAS CATO-C4X-1096160)
- Azilsartan Impurity 84 (CAS CATO-C4X-109684)
- Azilsartan Impurity N3 (CAS 147404-82-8)
- Azilsartan Impurity 116 (CAS CATO-C4X-1096116)
- Azilsartan Impurity 25 (CAS 1584730-02-8)
- Azilsartan Impurity 170 (CAS 1565796-93-1)
Recommended Standards
- 756525-99-2 N-[15-[(2,5-Dioxo-1-pyrrolidinyl)oxy]-15-oxo-3,6,9,12-tetraoxapentadec-1-yl]-2,5-dihydro-2,5-dioxo-1H-pyrrole-1-propanamide O-[N-(3-Maleimidopropionyl)aminoethyl]-O inverted exclamation marka-[3-(N-succinimidyloxy)-3-oxopropyl]triethylene glycol monodisperse Mal-PEG4-NHS-ester (CAS 756525-99-2)
- Gadoxetate Impurity 15 (CAS CATO-C4X-261815)
- trans-Zeatin-O-glucoside Riboside (CAS 62512-97-4)
- Ethyl 2-((4-acetamido-N-(4-(trifluoromethyl)phenyl)phenyl)sulfonamido)thiazole-4-carboxylate (CAS 860783-97-7)
- Delamanid Impurity 3 (CAS 1202875-92-0)
- Desmopressin EP Impurity A (CAS CATO-C4X-221523)
- Salbutamol Impurity 215 (CAS CATO-C4X-1176215)
- 2,5-Dichloro-N-(3-cyano-4-(methylsulfonyl)phenyl)benzamide (CAS 320421-60-1)
- 1-(4-Bromo-2-fluorophenyl)-3-(2-chloroethyl)urea (CAS 160132-69-4)
- Propargyl-PEG3-azide (CAS 932741-18-9)
- 3-Ethoxy-2,5-dimethyl-1,2-dihydropyrazine (CAS 747366-83-2)
- Z-D-Dab-OH (CAS 70882-66-5)
- J618WT46OL 59473-45-9 1-(Chloromethyl)-2-iodobenzene EINECS 261-779-2 UNII-J618WT46OL (CAS 59473-45-9)
- Semaglutide impurity 31 (CAS CATO-C4X-222631)
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