5-Bromo-3-methoxypyrazin-2(1H)-one CAS 89282-38-2
| CAS No. | 89282-38-2 |
| Molecular Formula | C5H5BrN2O2 |
| Molecular Weight | 205.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 205.01 g/mol gives 5-Bromo-3-methoxypyrazin-2(1H)-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-Bromo-3-methoxypyrazin-2(1H)-one (CAS 89282-38-2), molecular formula C5H5BrN2O2 and molecular weight 205.01 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 5-Bromo-3-methoxypyrazin-2(1H)-one (C5H5BrN2O2) is characterized by an amide group, a carboxylic acid 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. 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 analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-Bromo-3-methoxypyrazin-2(1H)-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 | C5H5BrN2O2 |
| Molecular Weight | 205.01 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-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 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
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- 2-Ethyl-5-(methoxymethyl)-1,2-dihydro-3H-pyrazol-3-one (CAS 1443110-66-4)
- Ethyl 8-fluoroimidazo[1,2-a]pyridine-2-carboxylate (CAS 1260843-88-6)
- 3-Isopropyl-6-methyl-1H-indazole (CAS 1415740-56-5)
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