Fexofenadine Impurity 19 CAS CATO-C4X-179419
| CAS No. | CATO-C4X-179419 |
| Molecular Formula | C33H39NO4 |
| Molecular Weight | 513.67 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 Fexofenadine Impurity 19.
CATO supplies Fexofenadine Impurity 19 (CAS CATO-C4X-179419), a pharmacopoeial impurity reference standard (molecular formula C33H39NO4, MW 513.67 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Fexofenadine Impurity 19 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 513.67 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO manufactures Fexofenadine Impurity 19 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 | C33H39NO4 |
| Molecular Weight | 513.67 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Fexofenadine Standards
- Fexofenadine Impurity 31 (CAS CATO-C4X-179431)
- Fexofenadine Impurity 17 (CAS 154477-55-1)
- Fexofenadine EP Impurity D (CAS 154825-96-4)
- Fexofenadine Impurity 45 (CAS CATO-C4X-179445)
- Fexofenadine N-Oxide (CAS 1422515-52-3)
- Fexofenadine-D6 (CAS 548783-71-7)
- Fexofenadine-d6 Methyl Ester (CAS 1286458-00-1)
- (R)-Fexofenadine (CAS 139965-10-9)
Recommended Standards
- R-Maraviroc (CAS 2414315-81-2)
- Maraviroc (CAS 376348-65-1)
- tert-Butyl cyclohexyl(5-(1-tosylpiperidin-2-yl)pyridin-2-yl)carbamate (CAS 1352490-98-2)
- Carebastine Methyl Ester (CAS 189064-48-0)
- Vitamin K1 Impurity 67 (CAS 4444-14-8)
- Faropenem Impurity 66 (CAS CATO-C4X-128966)
- Loxoprofen Impurity 60 (CAS 132560-66-8)
- Trimetazidine impurity 33 (CAS CATO-C4X-180333)
- Linaclotide impurity 34 (CAS CATO-C4X-210634)
- 6-Bromo-2-methoxy-4-methylquinoline (CAS 1187386-12-4)
- 3-(3,4-Difluorophenyl)propan-1-ol (CAS 301185-99-9)
- 2-Chloro-N'-phenylacetohydrazide (CAS 22940-21-2)
- 4-(Cyclopropyl(imino)methyl)-3-methylthiomorpholine 1,1-dioxide (CAS 1594679-01-2)
- Semaglutide impurity 108 (CAS CATO-C4X-2226108)
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