Umeclidinium Impurity 13 CAS 2253743-36-9
| CAS No. | 2253743-36-9 |
| Molecular Formula | C35H38NO2 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 584.60 g/mol gives Umeclidinium Impurity 13 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Umeclidinium Impurity 13 (CAS 2253743-36-9) is a certified pharmaceutical impurity reference standard with the molecular formula C35H38NO2Br and a molecular weight of 584.60 g/mol.
The molecular framework of Umeclidinium Impurity 13 (C35H38NO2Br) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), Umeclidinium Impurity 13 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 | C35H38NO2 Br |
| Molecular Weight | 584.60 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at room temperature, 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
Related Umeclidinium Standards
- Umeclidinium Bromide Impurity 25 (CAS 119102-52-2)
- Umeclidinium impurity 26 (CAS 1248400-28-3)
- Umeclidinium Impurity 1 (CAS 1509910-91-1)
- Umeclidinium impurity 22 (CAS 17229-17-3)
- Umeclidinium Impurity 15 (CAS 2230024-91-4(free base))
- Umeclidinium Impurity 19 (CAS 2253743-32-5)
- Umeclidinium Impurity 11 (CAS 2253743-38-1)
- Umeclidinium impurity 25 (CAS 22766-68-3)
Recommended Standards
- Fondaparinux Sodium Impurity 5 (CAS CATO-C4X-20525)
- Relebactam Impurity 20 (CAS CATO-C4X-214420)
- Brivaracetam impurity 101 (CAS CATO-C4X-2007101)
- N-(4-Methylthiazol-2-yl)-2-(thiophene-2-carboxamido)oxazole-4-carboxamide (CAS 1286719-74-1)
- 2-((2-(Methoxycarbonyl)phenyl)amino)-2-oxoethyl 5-methylthiophene-2-carboxylate (CAS 721913-39-9)
- 6-(chloromethyl)-3-phenyl-5,6-dihydro-4H-1,2,4-oxadiazine (CAS 56493-89-1)
- (R)-tert-Butyl 3-(pyrazin-2-yloxy)pyrrolidine-1-carboxylate (CAS 1264037-43-5)
- Tert-butyl (R)-4-iodo-2-isopropyl-2,3-dihydro-1H-pyrrolo[2,3-b]pyridine-1-carboxylate (CAS 2366996-94-1)
- Dodecyl L-alaninate (CAS 48072-10-2)
- Des-Ser34-Gly33Tirzepatide (CAS CATO-CPTD788941)
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