Flurbiprofen Impurity 91 CAS CATO-C4X-144491
| CAS No. | CATO-C4X-144491 |
| Molecular Formula | C16H12F2O4 |
| Molecular Weight | 306.26 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Flurbiprofen Impurity 91 (CAS CATO-C4X-144491), a pharmacopoeial impurity reference standard (molecular formula C16H12F2O4, MW 306.26 g/mol) used for the identification and quantification of trace impurities in APIs.
Flurbiprofen Impurity 91 (C16H12F2O4) contains a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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 | C16H12F2O4 |
| Molecular Weight | 306.26 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
Related Flurbiprofen Standards
- Flurbiprofen Impurity 148 (CAS CATO-C4X-1444148)
- Flurbiprofen Impurity 149 (CAS CATO-C4X-1444149)
- Flurbiprofen Impurity 129 (CAS 61467-16-1)
- Flurbiprofen Impurity 13 (CAS CATO-C4X-144413)
- Flurbiprofen Impurity 140 (CAS 1531637-33-8)
- Flurbiprofen Impurity 141 (CAS 486455-73-6)
- Flurbiprofen Impurity 15 (CAS CATO-C4X-144415)
- Flurbiprofen Impurity 153 (CAS CATO-C4X-1444153)
Recommended Standards
- 6-Methoxynaphth-1-yl trifluoromethanesulfonate (CAS 350584-53-1)
- Azathioprine Impurity 25 (CAS CATO-C4X-146325)
- 5-(4-Fluorophenyl)-1-phenyl-3-(trifluoromethyl)-1H-pyrazole (CAS 515845-17-7)
- Dabrafenib Impurity 29 (CAS CATO-C4X-303329)
- Posaconazole Impurity 103 (CAS 74852-62-3)
- Cefazolin Impurity 67 (CAS CATO-C4X-157767)
- Thioctic acid Impurity 38 (CAS 5238-47-1)
- Dyclonine-d9 Hydrochloride (CAS CATO-CCAD303547)
- Oseltamivir Impurity 69 (CAS CATO-C4X-172069)
- 1-Methyl-2,3-dihydro-1H-pyrrolo[2,3-b]pyridine-5-carboxylic acid (CAS 1294501-54-4)
- COD.IR.CL.IMES (CAS 509107-34-0)
- (4-Aminopiperidin-1-yl)(thiophen-3-yl)methanone (CAS 1153131-62-4)
- [2-(4-Chloro-phenyl)-oxazol-4-yl]-methanol (CAS 22087-22-5)
- Neuroendocrine Regulatory Peptide-1 (rat) (CAS 954420-51-0)
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