Fexofenadine Impurity 19 CAS 193217-39-9
| CAS No. | 193217-39-9 |
| Molecular Formula | C17H23NO3 |
| Molecular Weight | 289.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Fexofenadine Impurity 19 (CAS 193217-39-9), molecular formula C17H23NO3 and molecular weight 289.37 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Fexofenadine Impurity 19 (C17H23NO3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 289.37 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C17H23NO3 |
| Molecular Weight | 289.37 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2012 |
| Nitrogen Atoms | 1 |
Related Fexofenadine Standards
- Fexofenadine Impurity 22 (CAS 343255-26-5)
- Fexofenadine Impurity 12 (CAS 154477-54-0)
- Fexofenadine Impurity N22 (CAS 169032-11-5)
- Fexofenadine Impurity 2 (CAS 169280-21-1)
- Fexofenadine Impurity 29 (CAS CATO-C4X-179429)
- Fexofenadine Impurity 13 (CAS 88783-30-6)
- Fexofenadine EP Impurity E (CAS 115-46-8)
- Fexofenadine Impurity 23 (CAS 169280-25-5)
Recommended Standards
- 3,3-Diallyl-1-phenylindolin-2-one (CAS 19048-20-5)
- tert-Butyl 3-benzyl-4-oxopiperidine-1-carboxylate (CAS 193274-82-7)
- 4-Methoxy Propranolol (CAS 18507-09-0)
- 1-Boc-2-Benzyl-4-piperidinone (CAS 193480-28-3)
- (3-Nitro-5-(trifluoromethyl)pyridin-2-yl)methanol (CAS 1227598-42-6)
- 2-(Chlorodifluoromethyl)-4,6-bis(trifluoromethyl)-1,3,5-triazine (CAS 328-77-8)
- 1-[3-Chloro-5-(trifluoromethyl)phenyl]cyclopentanecarboxylic Acid (CAS 1894462-30-6)
- 2-(1-Benzyl-5-nitro-1H-indol-4-yl)acetonitrile (CAS 120627-50-1)
- Paliperidone Impurity 118 (CAS CATO-C4X-1724118)
- 2-(4,5-Dimethyl-1h-benzimidazol-2-yl)ethanamine dihydrochloride (CAS 1158292-10-4)
- Ixazomib Impurity 50 (CAS 220315-20-8)
- (3aR,6R,6aR)-6-{[(tert-Butyldimethylsilyl)oxy]methyl}-2,2-dimethyl-hexahydrocyclopenta[d][1,3]dioxol-4-one (CAS 145307-55-7)
- 4-(6-Methyl-4,8-dioxo-1,3,6,2-dioxazaborocan-2-yl)benzoic acid (CAS 1072960-67-8)
- Semaglutide impurity 60 (CAS CATO-C4X-222660)
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