Flurbiprofen Impurity 55 CAS 42771-82-4
| CAS No. | 42771-82-4 |
| Molecular Formula | C16H13FO4 |
| Molecular Weight | 288.27 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 Flurbiprofen Impurity 55.
Flurbiprofen Impurity 55 (CAS 42771-82-4) is a certified pharmaceutical impurity reference standard with the molecular formula C16H13FO4 and a molecular weight of 288.27 g/mol.
Based on its molecular formula C16H13FO4, Flurbiprofen Impurity 55 contains a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 288.27 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C16H13FO4 |
| Molecular Weight | 288.27 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1969 |
| Halogen Content | F-containing |
Related Flurbiprofen Standards
- Flurbiprofen Impurity N16 (CAS 252846-89-2)
- Flurbiprofen Impurity 105 (CAS CATO-C4X-1444105)
- Flurbiprofen Impurity 43 (CAS CATO-C4X-144443)
- Flurbiprofen Impurity 22 (CAS 1346604-78-1)
- Flurbiprofen Impurity 111 (CAS CATO-C4X-1444111)
- Flurbiprofen Impurity 58 (CAS CATO-C4X-144458)
- Flurbiprofen Impurity 27 (CAS CATO-C4X-144427)
- Flurbiprofen Impurity 17 (CAS 78543-08-5)
Recommended Standards
- Acacetin-13C-d3 (CAS CATO-C4X-115615)
- 4-(Methylsulfanyl)-2-[(5-nitrofuran-2-yl)formamido]butanoic acid (CAS 1008068-92-5)
- Enzalutamide Impurity 67 (CAS CATO-C4X-101667)
- Diethyl 3,5-dimethoxybenzylphosphonate (CAS 108957-75-1)
- Benzbromarone Impurity 9 (CAS 3131-63-3)
- Bilastine Impurity 126 (CAS CATO-C4X-2253126)
- Calcipotriol Impurity 10 (CAS 112849-27-1)
- 3-[(2S)-pyrrolidin-2-yl][1,2,4]triazolo[4,3-a]pyridine dihydrochloride (CAS 1052540-27-8)
- (S)-2-((tert-butoxycarbonyl)amino)-3-((S)-2-oxopyrrolidin-3-yl)propanoic acid (CAS 741267-75-4)
- 5-methyl-N-(propan-2-yl)-1,3,4-thiadiazol-2-amine (CAS 62347-23-3)
- 1-Methyl-5-phenyl-1H-pyrazole-4-carbaldehyde (CAS 154927-01-2)
- Etomidate Impurity 24 (CAS 91284-61-6)
- Sofosbuvir Impurity 105 (CAS 1946820-91-2)
- Peptide Impurity 34 (CAS 21282-09-7)
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