Flurbiprofen Impurity 44 CAS CATO-C4X-144444
| CAS No. | CATO-C4X-144444 |
| Molecular Formula | C12H16O3 |
| Molecular Weight | 208.25 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Flurbiprofen Impurity 44 (CAS CATO-C4X-144444) is a certified pharmaceutical impurity reference standard with the molecular formula C12H16O3 and a molecular weight of 208.25 g/mol.
Structurally, Flurbiprofen Impurity 44 (C12H16O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 208.25 g/mol, it falls into the medium-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.
As a certified reference material (CRM), Flurbiprofen Impurity 44 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 | C12H16O3 |
| Molecular Weight | 208.25 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Flurbiprofen Standards
- Flurbiprofen Impurity 85 (CAS CATO-C4X-144485)
- Flurbiprofen Impurity 61 (CAS 95037-98-2)
- Flurbiprofen Impurity 90 (CAS 145983-05-7)
- Flurbiprofen Impurity 79 (CAS CATO-C4X-144479)
- Flurbiprofen Impurity 162 (CAS 861795-19-9)
- Flurbiprofen Impurity 57 (CAS 81937-32-8)
- Flurbiprofen EP Impurity D (CAS 42771-79-9)
- Flurbiprofen EP Impurity E (CAS 137045-30-8)
Recommended Standards
- Metoprolol Impurity 29 (CAS 89507-60-8)
- Loxoprofen Impurity 45 (CAS 99807-55-3)
- Metoprolol Impurity 18 (CAS 56718-70-8)
- Oseltamivir Impurity 216 (CAS CATO-C4X-1720216)
- Apremilast Impurity 30 (CAS CATO-C4X-100930)
- Vildagliptin Impurity 35 (CAS CATO-C4X-110035)
- Nemonoxacin Impurity 93 HF (CAS CATO-C4X-312893)
- N-(3-Cyano-4,5,6,7-tetrahydro-1-benzothien-2-yl)-2-hydroxybenzamide (CAS 519167-28-3)
- 3,5-Dimethyl-1-(2,2,2-trifluoroethyl)-1h-pyrazole-4-sulfonyl chloride (CAS 1006462-90-3)
- [4,5'-Biisobenzofuran]-1,1',3,3'-tetraone, 97% (CAS 36978-41-3)
- (2,4-Dichlorophenyl)hydrazine (CAS 13123-92-7)
- 2-(n-Methyl4-methyl-1,3-thiazole-5-amido)benzoic acid (CAS 1016703-16-4)
- 2-(Pyrrolidin-1-ylmethyl)benzenethiol (CAS 1203644-34-1)
- Liraglutide Impurity 28 (CAS CATO-C4X-199228)
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