| CAS No. | 60931-34-2 |
| Molecular Formula | C11H11BrN2O3 |
| Molecular Weight | 299.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
3-(2-Bromophenyl)-5-isopropoxy-1,3,4-oxadiazol-2(3H)-one (CAS 60931-34-2), molecular formula C11H11BrN2O3 and molecular weight 299.12 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3-(2-Bromophenyl)-5-isopropoxy-1,3,4-oxadiazol-2(3H)-one (C11H11BrN2O3) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
| Molecular Formula | C11H11BrN2O3 |
| Molecular Weight | 299.12 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1974 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |