Flurbiprofen Impurity 89 CAS 75908-73-5
| CAS No. | 75908-73-5 |
| Molecular Formula | C9H9FO2 |
| Molecular Weight | 168.16 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.
Flurbiprofen Impurity 89 (CAS 75908-73-5) is a certified pharmaceutical impurity reference standard with the molecular formula C9H9FO2 and a molecular weight of 168.16 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system, Flurbiprofen Impurity 89 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 168.16 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 certified reference material (CRM), Flurbiprofen Impurity 89 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H9FO2 |
| Molecular Weight | 168.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Halogen Content | F-containing |
Related Flurbiprofen Standards
- Flurbiprofen Impurity 87 (CAS 65487-32-3)
- Flurbiprofen Impurity 42 (CAS CATO-C4X-144442)
- Flurbiprofen Impurity 54 (CAS 1845-59-6)
- Flurbiprofen Impurity 56 (CAS 5563-78-0)
- Flurbiprofen Impurity 41 (CAS 535-11-5)
- Flurbiprofen Impurity 23 (CAS 399-31-5)
- Flurbiprofen Impurity N1 (CAS 81937-33-9)
- Flurbiprofen Impurity 9 (CAS 477860-13-2)
Recommended Standards
- Tegoprazan Impurity 100 (CAS CATO-C4X-2297100)
- Temozolomide Impurity 4 (CAS 3413-72-7)
- 4H-Pyrrolo[3,2-d]thiazole-5-carboxylic acid (CAS 1007386-66-4)
- Metformin EP Impurity B (CAS 4405-08-7)
- Avibactam Impurity 76 (CAS CATO-C4X-134876)
- Sulpiride Impurity 12 (CAS CATO-C4X-187612)
- Losartan EP Impurity C(Potassium Salt) (CAS 860644-28-6)
- 2-Chloro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoic acid (CAS 890839-31-3)
- Cabazitaxel Impurity 7 (CAS CATO-C4X-11157)
- 6-Acetyl-3-amino-N-(4-fluorophenethyl)-4-(trifluoromethyl)-5,6,7,8-tetrahydrothieno[2,3-b][1,6]naphthyridine-2-carboxamide (CAS 727663-24-3)
- [(4-Bromobutyl)sulfanyl]benzene (CAS 17742-54-0)
- 4-Cyanophenyl hydroxycarbamimidate (CAS 651306-31-9)
- 8-Fluoroquinoline-5-carboxylic acid (CAS 204782-93-4)
- Semaglutide impurity 277 (CAS CATO-C4X-2226277)
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