Flurbiprofen Impurity 25 CAS 91503-88-7
| CAS No. | 91503-88-7 |
| Molecular Formula | C19H19FO4 |
| Molecular Weight | 330.35 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Flurbiprofen Impurity 25 is closely related to a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Flurbiprofen Impurity 25 (CAS 91503-88-7) is a certified pharmaceutical impurity reference standard with the molecular formula C19H19FO4 and a molecular weight of 330.35 g/mol.
Structurally, Flurbiprofen Impurity 25 (C19H19FO4) contains a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 330.35 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 manufactures Flurbiprofen Impurity 25 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C19H19FO4 |
| Molecular Weight | 330.35 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 |
| 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.) | 1983 |
| Halogen Content | F-containing |
Related Flurbiprofen Standards
- Flurbiprofen impurity 103 (CAS CATO-C4X-1444103)
- Flurbiprofen Impurity 104 (CAS CATO-C4X-1444104)
- Flurbiprofen Impurity 109 (CAS 119623-42-6)
- (R)-Flurbiprofen Axetil (Mixture of Diastereomers) (CAS 2375240-97-2)
- (S)-Flurbiprofen Axetil (Mixture of Diastereomers) (CAS 1401087-64-6)
- Flurbiprofen Axetil (CAS 91503-79-6)
- Flurbiprofen Impurity 38 (CAS 26039-74-7)
- Flurbiprofen Impurity 35 (CAS CATO-C4X-144435)
Recommended Standards
- Linezolid Impurity 82 (CAS CATO-C4X-107382)
- N-(6,7-Dihydro-[1,4]dioxino[2',3':4,5]benzo[1,2-d]thiazol-2-yl)-1,3-dimethyl-1H-pyrazole-5-carboxamide (CAS 1013796-73-0)
- Linezolid Impurity 45 (CAS 168828-81-7)
- Methyl 4-((N-(tert-butoxycarbonyl)sulfamoyl)amino)benzoate (CAS 1017782-69-2)
- Memantine Impurity 43 (CAS 53343-18-3)
- Amlodipine Impurity 100 (CAS CATO-C4X-1095100)
- Cefazolin Impurity 61 (CAS CATO-C4X-157761)
- Ethyl 2-bromo-6-cyano-4-(difluoromethyl)benzoate (CAS 1807073-42-2)
- 6-(Tetrahydro-2H-pyran-4-yloxy)pyridine-2-carboxylic acid (CAS 906352-78-1)
- 2,2-Dimethylpentanedinitrile (CAS 22247-63-8)
- 2-(2-Chloro-7-methoxyquinolin-3-yl)acetic acid (CAS 1774899-55-6)
- 7-METHYL-THIAZOLO[4,5-B]PYRIDINE-2,5(3H,4H)-DIONE (CAS 128294-07-5)
- 4-Chloro-2,6-dimethylpyrimidine (CAS 4472-45-1)
- (Leu31,Pro3?)-Neuropeptide Y (human, rat) trifluoroacetate salt (CAS 132699-73-1)
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