Bilastine Impurity 19 CAS 202189-81-9
| CAS No. | 202189-81-9 |
| Molecular Formula | C28H36N4O |
| Molecular Weight | 444.61 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Bilastine Impurity 19 (CAS 202189-81-9), a pharmacopoeial impurity reference standard (molecular formula C28H36N4O, MW 444.61 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C28H36N4O, Bilastine Impurity 19 contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 444.61 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C28H36N4O |
| Molecular Weight | 444.61 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2014 |
| Nitrogen Atoms | 4 |
Related Bilastine Standards
- Bilastine Impurity 138 (CAS CATO-C4X-2253138)
- Bilastine impurity 113 (CAS CATO-C4X-2253113)
- Bilastine Impurity 14 (CAS 2767508-98-3)
- Bilastine Impurity 23 (CAS CATO-C4X-225323)
- Bilastine Impurity 22 (CAS CATO-C4X-225322)
- Bilastine Impurity 44 (CAS CATO-C4X-225344)
- Bilastine Impurity 3 (CAS 202189-83-1)
- Bilastine Impurity 123 (CAS CATO-C4X-2253123)
Recommended Standards
- Salbutamol Impurity 204 (CAS CATO-C4X-1176204)
- 3-Chloro-6'-(2,4-dichlorophenoxy)-5-(trifluoromethyl)-[2,3'-bipyridine]-5'-carbonitrile (CAS 339011-79-9)
- Salbutamol Impurity 175 (CAS CATO-C4X-1176175)
- N-(4-Bromophenyl)-1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-1H-pyrrole-2-carboxamide (CAS 338956-49-3)
- (Z)-Ceftizoxime Impurity 59 (CAS CATO-C4X-179359)
- Halometasone Impurity 6 (CAS CATO-C4X-14466)
- Lifitegrast Impurity 64 (CAS 2832127-60-1)
- 4-Bromo-1-chloro-2-(trifluoromethoxy)benzene (CAS 406232-79-9)
- 2-(3-(Hydroxymethyl)pyrrolidin-1-yl)butanoic acid (CAS 1343179-42-9)
- (Phenylmethyl)pyrimidine (CAS 106564-15-2)
- ETHYL 3-(4-HYDROXY-3-METHOXYPHENYL)-3-OXOPROPANOATE (CAS 56222-44-7)
- Tivozanib Impurity 23 (CAS CATO-C4X-340023)
- Dodecahydrodibenzofuran (mixture of isomers) (CAS 13054-98-3)
- Experimental Allergic Encephalitogenic Peptide (CAS 29705-92-8)
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