Ketoprofen Impurity 26 CAS 1777829-91-0
| CAS No. | 1777829-91-0 |
| Molecular Formula | C20H23NO5 |
| Molecular Weight | 357.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C20H23NO5, Ketoprofen Impurity 26 contains a flavonoid 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 357.40 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).
Ketoprofen Impurity 26 (CAS 1777829-91-0) is a certified pharmaceutical impurity reference standard with the molecular formula C20H23NO5 and a molecular weight of 357.40 g/mol.
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.
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 | C20H23NO5 |
| Molecular Weight | 357.40 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Nitrogen Atoms | 1 |
Related Ketoprofen Standards
- Ketoprofen Impurity 116 (CAS 1777830-06-4)
- Ketoprofen Impurity 60 (CAS 1777830-05-3)
- Ketoprofen Impurity 88 (CAS 1984110-22-6)
- Ketoprofen Impurity 93 (CAS 2733641-85-3)
- Ketoprofen Impurity 94 (CAS CATO-C4X-147194)
- Ketoprofen Impurity 115 (CAS 72235-46-2)
- Ketoprofen 2-Ethylhexyl Ester (CAS CATO-C4X-147169)
- Ketoprofen Impurity 68 (CAS CATO-C4X-147168)
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