Olopatadine Impurity 41 CAS CATO-C4X-171841
| CAS No. | CATO-C4X-171841 |
| Molecular Formula | C21H23NO2 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Olopatadine Impurity 41 (C21H23NO2HCl) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine 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.
As a process- or degradation-related impurity, Olopatadine Impurity 41 (CAS CATO-C4X-171841, C21H23NO2HCl) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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 Olopatadine Impurity 41 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 | C21H23NO2 HCl |
| Molecular Weight | 357.88 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 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Olopatadine Standards
- Olopatadine Impurity 44 (CAS 111088-69-8)
- Olopatadine Impurity 43 (CAS 1127893-02-0)
- Olopatadine Methyl Ester HCl (CAS 113805-71-3（free base）)
- Olopatadine Impurity 51 (CAS 113806-01-2)
- Olopatadine Ethyl Ester (HCl) (CAS 113806-03-4)
- Olopatadine (CAS 113806-05-6)
- (E)-Olopatadine (CAS 113806-06-7)
- Olopatadine Impurity N3 (CAS 113835-76-0)
Recommended Standards
- Trelagliptin Impurity 14 Dihydrochloride (CAS 1917324-14-1（free base）)
- Tafluprost Impurity 27 (CAS CATO-C4X-216327)
- Lifitegrast Impurity 14 (CAS CATO-C4X-240914)
- Methyl furo[2,3-b]pyridine-5-carboxylate (CAS 169815-80-9)
- 6-(Bromomethyl)-1-fluoronaphthalene (CAS 70631-38-8)
- 2-Methoxyethyl 2-(4-chlorobenzylidene)-7-methyl-3-oxo-5-(thiophen-2-yl)-3,5-dihydro-2H-thiazolo[3,2-a]pyrimidine-6-carboxylate (CAS 617697-08-2)
- 5-(2,2,3,3-Tetramethylcyclopropyl)-1,2,4-oxadiazole-3-carboxylic acid (CAS 1516015-63-6)
- 4-Bromo-3-(chloromethyl)-6-(difluoromethyl)pyridin-2-amine (CAS 1806844-89-2)
- Dipyrido[3,2-a:3',2'-h]phenazine (CAS 226-49-3)
- Semaglutide impurity 273 (CAS CATO-C4X-2226273)
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