Umeclidinium Impurity 11 CAS 2253743-38-1
| CAS No. | 2253743-38-1 |
| Molecular Formula | C35H38NO2 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Umeclidinium Impurity 11 (CAS 2253743-38-1) 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 11 (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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
CATO manufactures Umeclidinium Impurity 11 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
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 13 (CAS 2253743-36-9)
- Umeclidinium impurity 25 (CAS 22766-68-3)
Recommended Standards
- Pramipexole Impurity 40 (CAS 1867177-06-7)
- Ixazomib Impurity 29 (CAS 1201903-03-8)
- Selexipag Impurity 26 (CAS CATO-C4X-196126)
- 4-Bromo-2-ethyl-5-((4-fluorobenzyl)oxy)pyridazin-3(2H)-one (CAS 88094-58-0)
- Clavulanic Acid Methyl-d3 Ester (CAS CATO-C4X-150116)
- N-Ethyl-1H-pyrrolo[2,3-b]pyridin-6-amine (CAS 918510-54-0)
- (2-(2-Methylpyridin-4-yl)pyrrolidin-1-yl)(phenyl)methanone (CAS 1352530-70-1)
- (2S)-3-{4-[(2-chlorophenyl)diphenylmethoxy]phenyl}-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid (CAS 350241-80-4)
- 5-(Phenylamino)quinolin-8-ol (CAS 60093-42-7)
- Neuroendocrine Regulatory Peptide-1 (rat) (CAS 954420-51-0)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com