Linezolid Impurity 4 CAS 496031-56-2
| CAS No. | 496031-56-2 |
| Molecular Formula | C16H19FN2O5 |
| Molecular Weight | 338.33 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Linezolid Impurity 4 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.
Linezolid Impurity 4 (CAS 496031-56-2) is a certified pharmaceutical impurity reference standard with the molecular formula C16H19FN2O5 and a molecular weight of 338.33 g/mol.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, Linezolid Impurity 4 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 338.33 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).
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.
Physical & Chemical Properties
| Molecular Formula | C16H19FN2O5 |
| Molecular Weight | 338.33 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Linezolid Standards
Recommended Standards
- trimethyl-[2-[[4-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrazol-1-yl]methoxy]ethyl]silane (CAS 2780325-20-2)
- Methyl 1-(2-cyanoethyl)-6-(4-fluorophenyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate (CAS 1018142-10-3)
- Ethyl 4-(4-fluorophenoxy)-2-phenylpyrimidine-5-carboxylate (CAS 477854-81-2)
- 1-(3-Fluorobenzyl)-N-(3-methylpyridin-2-yl)-6-oxo-1,6-dihydropyridazine-3-carboxamide (CAS 1040664-11-6)
- Iguratimod Impurity 28 HCl (CAS CATO-C4X-182628)
- Methylergometrine EP Impurity C (CAS 478-94-4)
- Lifitegrast Impurity 86 (CAS CATO-C4X-240986)
- Ethyl 3-amino-1-(4-methoxyphenyl)-1H-pyrazole-4-carboxylate (CAS 1225151-65-4)
- 3,4-Difluoro-5-formylbenzonitrile (CAS 633327-23-8)
- 3,5-Dimethyl-1-((perfluorophenyl)methyl)-1h-pyrazol-4-amine (CAS 895929-03-0)
- Cyclohexyltriethoxysilane (CAS 18151-84-3)
- Methyl 6-((3,5-dimethoxyphenyl)amino)-5-oxo-1,2,3,5-tetrahydroindolizine-8-carboxylate (CAS 612065-21-1)
- Methyl 3-((5-methylpyridin-2-yl)amino)propanoate (CAS 857175-93-0)
- Semaglutide Impurity 122 (CAS CATO-C4X-2226122)
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