Vilanterol Impurity 43 CAS CATO-C4X-193543
| CAS No. | CATO-C4X-193543 |
| Molecular Formula | C13H18Cl2O2 |
| Molecular Weight | 277.19 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 Vilanterol Impurity 43.
Vilanterol Impurity 43 (CAS CATO-C4X-193543) is a certified pharmaceutical impurity reference standard with the molecular formula C13H18Cl2O2 and a molecular weight of 277.19 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, Vilanterol Impurity 43 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 277.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 Vilanterol Impurity 43 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 | C13H18Cl2O2 |
| Molecular Weight | 277.19 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
Related Vilanterol Standards
- Vilanterol Impurity 55 (CAS CATO-C4X-193555)
- Vilanterol Impurity 1 (CAS CATO-C4X-19351)
- Vilanterol Impurity 2 (CAS CATO-C4X-19352)
- Vilanterol Impurity 3 (CAS 452340-96-4)
- Vilanterol Impurity 4 (CAS CATO-C4X-19354)
- Vilanterol Impurity 41 (CAS 452339-73-0)
- Vilanterol Impurity 44 (CAS CATO-C4X-193544)
- Vilanterol Impurity 69 (CAS 2514942-86-8)
Recommended Standards
- Dichlorodi-p-xylylene (CAS 28804-46-8)
- (±)-Clenbuterol (CAS 37148-27-9)
- 338978-81-7 5-[(2,4-dichlorophenyl)sulfanyl]-4-methyl-1,2,3-thiadiazole KS-00003FKM (CAS 338978-81-7)
- 3,3,3-Trifluoro-N-[(phenylmethoxy)carbonyl]alanine (CAS 10068-52-7)
- Hydroxychloroquine EP Impurity F (CAS 6281-58-9)
- Pyridoxine (Vitamin B6) Impurity 54 (CAS 23429-04-1)
- Cabazitaxel Impurity 18 (CAS 1714967-27-7)
- 1-(3,4-dimethylphenyl)-3-(trifluoromethyl)-1H-pyrazol-5-amine (CAS 1226268-82-1)
- 2-[3-chloro-5-(trifluoromethyl)-2-pyridinyl]-2-(2-thienylmethyl)malononitrile (CAS 339102-34-0)
- Estriol Impurity 20 (CAS CATO-C4X-163720)
- 2-[(2-methylpropyl)amino]acetic acid hydrochloride (CAS 3182-86-3)
- Tert-butyl (S)-(2-(4-acetylmorpholin-2-yl)ethyl)carbamate (CAS 1824448-88-5)
- N-cyclopropyl-3,5-dimethylisoxazole-4-carboxamide (CAS 925615-76-5)
- Semaglutide-d5 (CAS CATO-C4X-2226153)
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