5-(3,4-Difluorophenyl)oxazolidin-2-one CAS 20805-18-9
| CAS No. | 20805-18-9 |
| Molecular Formula | C9H7F2NO2 |
| Molecular Weight | 199.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 5-(3,4-Difluorophenyl)oxazolidin-2-one (CAS 20805-18-9), a certified reference material (molecular formula C9H7F2NO2, MW 199.15 g/mol) for analytical method development and quality control.
Based on its molecular formula C9H7F2NO2, 5-(3,4-Difluorophenyl)oxazolidin-2-one contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 199.15 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), 5-(3,4-Difluorophenyl)oxazolidin-2-one 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 | C9H7F2NO2 |
| Molecular Weight | 199.15 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Difluorophenyl Standards
- 4-(2,4-Difluorophenyl)oxazolidin-2-one (CAS 1467843-67-9)
- 4-(2,6-Difluorophenyl)oxazolidin-2-one (CAS 1479628-19-7)
- 5-(2,3-Difluorophenyl)oxazolidin-2-one (CAS 1492643-36-3)
- 5-(2,4-Difluorophenyl)oxazolidin-2-one (CAS 1494490-18-4)
- 4-(2,5-Difluorophenyl)oxazolidin-2-one (CAS 1496653-22-5)
- 4-(3,4-Difluorophenyl)oxazolidin-2-one (CAS 225641-91-8)
- 2-(2,5-Difluorophenyl)morpholine (CAS 1097797-26-6)
- 2-(2,4-Difluorophenyl)morpholine (CAS 1097797-34-6)
Recommended Standards
- 4,4-Difluoro-1-(pyridin-2-yl)butane-1,3-dione (CAS 893644-26-3)
- 5-(Trifluoromethyl)-1,3,4-thiadiazole-3(2H)-carboxamide (CAS 88976-74-3)
- 4-(Difluoromethoxy)-3-methoxybenzonitrile (CAS 832737-32-3)
- 5,5-Difluoro-6,7-dihydro-5H-cyclopenta[b]pyridine-3-carboxylic acid (CAS 2769114-72-7)
- 2-(4,5-dimethyl-1H-imidazol-1-yl)-1H-1,3-benzodiazol-5-amine (CAS 1542093-63-9)
- 2-Chloro-n-(2-difluoromethanesulfonylphenyl)acetamide (CAS 930395-65-6)
- 6-(Hydroxymethyl)-2-oxo-2H-chromene-3-carboxylic acid (CAS 176770-22-2)
- 4-Bromo-N3,N3-dimethylpyridine-2,3-diamine (CAS 1417535-05-7)
- (2E)-3-(3-Chlorophenyl)-1-(4-ethoxyphenyl)prop-2-en-1-one (CAS 358343-54-1)
- (5,7-Dichloro-2-oxo-1,2-dihydroquinolin-3-yl)boronic acid (CAS 172843-58-2)
- ethyl 2-[3-(2-ethoxy-2-oxo-ethyl)oxetan-3-yl]acetate (CAS 1262769-94-7)
- 3-amino-5-methyl-1-(1-methyl-1H-pyrazol-4-yl)pyrrolidin-2-one (CAS 1354949-34-0)
- 2-Amino-1-((S)-2-(((cyclopropylmethyl)amino)methyl)piperidin-1-yl)-3-methylbutan-1-one (CAS 1354024-71-7)
- Semaglutide impurity 94 (CAS CATO-C4X-222694)
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