Fexofenadine impurity 43 CAS CATO-C4X-179443
| CAS No. | CATO-C4X-179443 |
| Molecular Formula | C11H14O3 |
| Molecular Weight | 194.23 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 supplies Fexofenadine impurity 43 (CAS CATO-C4X-179443), a pharmacopoeial impurity reference standard (molecular formula C11H14O3, MW 194.23 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C11H14O3, Fexofenadine impurity 43 contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 194.23 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).
CATO manufactures Fexofenadine 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 | C11H14O3 |
| Molecular Weight | 194.23 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Fexofenadine Standards
- Fexofenadine Impurity 27 (CAS 24911-30-6)
- Fexofenadine Impurity 26 (CAS 169280-26-6)
- Fexofenadine Impurity 21 (CAS 162096-54-0)
- Fexofenadine Impurity 18 (CAS 880088-78-8)
- Fexofenadine Impurity 10 (CAS CATO-C4X-179410)
- Fexofenadine Impurity 23 (CAS 169280-25-5)
- Fexofenadine Impurity 13 (CAS 88783-30-6)
- Fexofenadine EP Impurity E (CAS 115-46-8)
Recommended Standards
- Minoxidil EP Impurity C (CAS 1798387-81-1)
- Lacosamide EP Impurity E(R-Isomer) (CAS 175481-39-7)
- Ipratropium Impurity 22 (CAS 3979-14-4)
- Nikethamide Impurity 18 (CAS CATO-C4X-186118)
- Glycerol Impurity 49 (CAS CATO-C4X-217149)
- Mizolastine Impurity 9 (CAS CATO-C4X-20069)
- Moxifloxacin Impurity 151 (CAS CATO-C4X-1074151)
- 2,6-Dimethyl-3,5-dinitrobenzoic Acid (CAS 118561-70-9)
- 1-(4-Hydroxypiperidin-1-yl)-2-(thiophen-3-yl)ethan-1-one (CAS 916791-31-6)
- Oxcarbazepine Impurity 40 (CAS 186694-45-1)
- 2-Allyl-6-isopropylphenol (CAS 3354-56-1)
- 5-(methoxymethoxy)-2-methylpyridine (CAS 223715-90-0)
- (3S)-N,N-Dimethylazepan-3-amine (CAS 197086-51-4)
- a2,3-Sialylglycopeptide (CAS 189035-43-6)
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