Epinastine Impurity 24 CAS 1110929-19-5
| CAS No. | 1110929-19-5 |
| Molecular Formula | C16H17NO2 |
| Molecular Weight | 255.31 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Epinastine Impurity 24.
CATO supplies Epinastine Impurity 24 (CAS 1110929-19-5), a pharmacopoeial impurity reference standard (molecular formula C16H17NO2, MW 255.31 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Epinastine Impurity 24 (C16H17NO2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 255.31 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C16H17NO2 |
| Molecular Weight | 255.31 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 1 |
Related Epinastine Standards
- Epinastine Impurity 58 (CAS CATO-C4X-184058)
- Epinastine Impurity 57 (CAS CATO-C4X-184057)
- Epinastine Impurity N7 (CAS 21535-43-3)
- Epinastine (CAS 80012-43-7)
- Epinastine Impurity 12 (CAS 745761-19-7)
- Epinastine EP Impurity A (CAS 706753-75-5)
- Epinastine Impurity 45 (CAS CATO-C4X-184045)
- Epinastine Impurity 27 (CAS CATO-C4X-184027)
Recommended Standards
- Pioglitazone impurity 49 (CAS CATO-C4X-138349)
- Cilastatin Impurity 28 (CAS CATO-C4X-196028)
- Pioglitazone Aldehyde Impurity (CAS 114393-97-4)
- Metaraminol Impurity 111 (CAS CATO-C4X-2252111)
- Formoterol impurity 112 (CAS 63192-58-5)
- Nicergoline EP Impurity B (CAS 35264-46-1)
- Ceftriaxone Impurity 37 (CAS 149-30-4)
- 3-((Benzo[d][1,3]dioxol-5-ylmethyl)amino)-1H-pyrazole-4-carbonitrile (CAS 1025724-89-3)
- 4-(3-Hydroxynon-1-en-1-yl)hexahydro-2H-cyclopenta[b]furan-2,5-diol (CAS 89540-57-8)
- 3-Isopropylpiperidine (CAS 13603-18-4)
- N-benzyl-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine-3-carboxamide hydrochloride (CAS 1220038-34-5)
- Perfluoro-6-isopropoxyhexanamide (CAS 29952-92-9)
- 2,2-Dimethylpropane-1-thiol (CAS 1679-08-9)
- Semaglutide impurity 195 (CAS CATO-C4X-2226195)
Why CATO?
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com