Azelastine Impurity 67 CAS CATO-C4X-139667
| CAS No. | CATO-C4X-139667 |
| Molecular Formula | C15H13ClN2O |
| Molecular Weight | 272.73 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Azelastine Impurity 67 (CAS CATO-C4X-139667) is a certified pharmaceutical impurity reference standard with the molecular formula C15H13ClN2O and a molecular weight of 272.73 g/mol.
Azelastine Impurity 67 (C15H13ClN2O) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine 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. 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.
Physical & Chemical Properties
| Molecular Formula | C15H13ClN2O |
| Molecular Weight | 272.73 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Azelastine Standards
- Azelastine Impurity 68 (CAS CATO-C4X-139668)
- Azelastine Impurity 13 (CAS 791758-74-2)
- Azelastine Hydrochloride EP Impurity C (CAS 53242-76-5)
- Azelastine Impurity 45 (CAS 148960-78-5)
- Azelastine Impurity 47 (CAS CATO-C4X-139647)
- Azelastine EP Impurity D (CAS 53242-88-9)
- Azelastine impurity 58 (CAS CATO-C4X-139658)
- Azelastine EP Impurity E (Z-Isomer) (CAS 105279-16-1)
Recommended Standards
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- Ertapenem Impurity C344 (CAS 135042-12-5)
- Ethacridine Lactate Impurity 29 (CAS CATO-C4X-260929)
- Lansoprazole Impurity 10 (CAS 1083100-27-9)
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