Epinastine Impurity 18 CAS CATO-C4X-184018
| CAS No. | CATO-C4X-184018 |
| Molecular Formula | C15H13Cl2NO |
| Molecular Weight | 294.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
Epinastine Impurity 18 (CAS CATO-C4X-184018) is a certified pharmaceutical impurity reference standard with the molecular formula C15H13Cl2NO and a molecular weight of 294.18 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, Epinastine Impurity 18 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 294.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C15H13Cl2NO |
| Molecular Weight | 294.18 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| 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 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Epinastine Standards
- Epinastine Impurity 8 (CAS CATO-C4X-18408)
- Epinastine Impurity 35 (CAS CATO-C4X-184035)
- Epinastine Impurity 25 (CAS CATO-C4X-184025)
- Epinastine Impurity 11 (CAS 2702358-41-4)
- Epinastine Impurity 20 (CAS CATO-C4X-184020)
- Epinastine Impurity 46 (CAS CATO-C4X-184046)
- Epinastine Impurity 17 (CAS 23207-75-2)
- Epinastine Impurity 42 (CAS CATO-C4X-184042)
Recommended Standards
- N-(3,4-dichlorophenyl)-3,5-dimethylbenzamide (CAS 700857-76-7)
- 2-(4-Bromophenyl)-2-(4-methylpiperazin-1-yl)acetonitrile (CAS 1017433-02-1)
- 6-Benzyl-2,4-dichloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine (CAS 778574-06-4)
- 3-Bromo-1-(1,2-dimethyl-1H-indol-3-yl)-2-methylpropan-1-one (CAS 1134334-70-5)
- Gatifloxacin Impurity 14 (CAS 114213-69-3)
- Leuprorelin Impurity 55 (CAS CATO-C4X-182255)
- Fluvoxamine Impurity 18 (CAS CATO-C4X-195118)
- 4-(Hydroxymethyl)benzo[d]oxazole-2-carbonitrile (CAS 1806486-84-9)
- ((3-Aminophenyl)sulfonyl)glycine (CAS 109065-68-1)
- 4-(3-Methoxyphenyl)-4h-1,2,4-triazole-3-thiol (CAS 36017-21-7)
- 3-[2-Oxo-5-(thiophen-2-yl)-2,3-dihydro-1,3,4-oxadiazol-3-yl]propanenitrile (CAS 866009-84-9)
- Acridine red (CAS 2465-29-4)
- 2,6-Dichloro-4-(trichloromethyl)pyridine (CAS 22652-14-8)
- Semaglutide impurity 01 (CAS 1998701-31-7)
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