Desloratadine Impurity 23 CAS 117811-12-8
| CAS No. | 117811-12-8 |
| Molecular Formula | C19H19ClN2O |
| Molecular Weight | 326.82 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C19H19ClN2O, Desloratadine Impurity 23 contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 326.82 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Desloratadine Impurity 23 (CAS 117811-12-8) is a certified pharmaceutical impurity reference standard with the molecular formula C19H19ClN2O and a molecular weight of 326.82 g/mol.
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), Desloratadine Impurity 23 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 | C19H19ClN2O |
| Molecular Weight | 326.82 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Desloratadine Standards
- Desloratadine Impurity 16 (CAS 1346604-23-6)
- Desloratadine Impurity 17 (CAS 169253-26-3)
- Desloratadine Impurity 22 (CAS 119410-05-8)
- Desloratadine N-Hydroxy Impurity (CAS 1193725-73-3)
- Desloratadine-d1 N-Oxide (CAS 1794817-18-7)
- Desloratadine Impurity 30 (CAS 183198-48-3)
- Desloratadine Impurity 33 (CAS 38092-90-9)
- Desloratadine Impurity 35 (CAS 38092-88-5)
Recommended Standards
- 4-Chloro-2-styryl-5,6,7,8-tetrahydrobenzo[4,5]thieno[2,3-d]pyrimidine (CAS 101130-32-9)
- 3-Chloro-2-methyl-N-(4-(pyrrolidin-1-yl)but-2-yn-1-yl)benzenesulfonamide (CAS 1396856-52-2)
- 3-Hydroxy Desloratadine (CAS 119410-08-1)
- 2-[(4-Chlorophenyl)methyl]-4-(prop-2-en-1-ylsulfanyl)quinazoline (CAS 303149-30-6)
- Dasatinib Impurity 57 (CAS 2135905-86-9)
- Regorafenib Impurity 12 (CAS CATO-C4X-104712)
- Glumetinib Impurity 8 (CAS CATO-C4X-32598)
- 2-n-Butyl-5-ethylthiophene (CAS 54411-06-2)
- Tert-butyl 2-chloro-5-oxo-5,7-dihydrospiro[cyclopenta[b]pyridine-6,4'-piperidine]-1'-carboxylate (CAS 2245084-86-8)
- 2-(Trimethylsilyl)oxazole (CAS 120629-79-0)
- rac-3-({[(1r,4r)-4-hydroxycyclohexyl]amino}methyl)phenol (CAS 1592539-38-2)
- 8-Methoxyisochroman-1-one (CAS 30404-50-3)
- 5-(4-(4,5-Dichloro-1H-imidazol-1-yl)phenyl)-4-nitro-1H-pyrazole (CAS 650592-12-4)
- Peptide YY (human) trifluoroacetate salt (CAS 118997-30-1)
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