Flurbiprofen Impurity 128 CAS 1515948-47-6
| CAS No. | 1515948-47-6 |
| Molecular Formula | C12H6Br2F2 |
| Molecular Weight | 347.98 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C12H6Br2F2, Flurbiprofen Impurity 128 contains fluorine/bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 347.98 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).
As a process- or degradation-related impurity, Flurbiprofen Impurity 128 (CAS 1515948-47-6, C12H6Br2F2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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 | C12H6Br2F2 |
| Molecular Weight | 347.98 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1992 |
| Halogen Content | F/Br-containing |
Related Flurbiprofen Standards
- Flurbiprofen Impurity 94 (CAS 121734-75-6)
- Flurbiprofen Impurity 14 (CAS CATO-C4X-144414)
- Flurbiprofen Impurity 151 (CAS 836607-32-0)
- Flurbiprofen Impurity 1 (CAS 42771-81-3)
- Flurbiprofen Impurity 29 (CAS 1206101-29-2)
- Flurbiprofen Impurity 81 (CAS CATO-C4X-144481)
- Flurbiprofen Impurity 169 (CAS CATO-C4X-1444169)
- Flurbiprofen Impurity 127 (CAS CATO-C4X-1444127)
Recommended Standards
- 3-Bromo-4-iodonaphthalen-1-amine (CAS 1242028-67-6)
- Ethyl 3,6-dibromoimidazo[1,2-a]pyridine-2-carboxylate (CAS 1119448-99-5)
- 4,5-Dibromo-2-(4-fluorophenyl)pyridazin-3(2H)-one (CAS 221031-01-2)
- 2,3-Dibromo-6,7-dimethoxyquinoxaline (CAS 1372142-07-8)
- Bumetanide Impurity 87 (CAS CATO-C4X-198687)
- Etrasimod Impurity 43 (CAS 2412764-04-4)
- Avatrombopag Impurity 68 (CAS 2325305-38-0)
- Luliconazole impurity 19 (CAS CATO-C4X-285319)
- Benzylpenicillin Impurity 68 (CAS 30200-14-7)
- n-Ethyl-2,6-dimethylmorpholine-4-sulfonamide (CAS 1094710-65-2)
- 2-(2-Fluoro-4-methyl-3-(trifluoromethyl)phenyl)acetonitrile (CAS 1823323-72-3)
- 3-Chloro-6-(4-methyl-1H-pyrazol-1-yl)pyridazine (CAS 1158452-17-5)
- 7-Acetyl-4-methoxybenzo[d]thiazol-2(3H)-one (CAS 662111-32-2)
- Palmitoyl Tetrapeptide-7 (CAS 221227-05-0)
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