2-Fluoro-3-methoxypyrazine CAS 1261489-99-9
| CAS No. | 1261489-99-9 |
| Molecular Formula | C5H5FN2O |
| Molecular Weight | 128.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 128.10 g/mol gives 2-Fluoro-3-methoxypyrazine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2-Fluoro-3-methoxypyrazine (CAS 1261489-99-9) is a high-purity analytical reference standard with the molecular formula C5H5FN2O and a molecular weight of 128.10 g/mol.
Based on its molecular formula C5H5FN2O, 2-Fluoro-3-methoxypyrazine contains 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 128.10 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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.
Physical & Chemical Properties
| Molecular Formula | C5H5FN2O |
| Molecular Weight | 128.10 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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 |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Fluoro Standards
- 5-Fluoro-4-methoxypyrimidine (CAS 120258-30-2)
- 5-Fluoro-2-(hydroxymethyl)pyrimidine (CAS 1227574-72-2)
- 4-fluoro-5-methylfuran-2-carbaldehyde (CAS 1368383-51-0)
- 4-fluoro-5-methylfuran-3-carbaldehyde (CAS 1369383-36-7)
- 5-Fluoro-2-methylpyrimidin-4-ol (CAS 1480-91-7)
- 2-Fluoro-1-(1H-imidazol-1-yl)ethanone (CAS 161468-13-9)
- 3-Fluoro-1-methyl-1H-pyrazole-4-carbaldehyde (CAS 1934527-90-8)
- 3-Fluoro-6-methoxypyridazine (CAS 1934842-49-5)
Recommended Standards
- 3-Amino-5-fluoropyridin-2(1H)-one (CAS 1257069-38-7)
- (3,3,3-Trifluoropropyl)hydrazine (CAS 1344334-40-2)
- 4-Amino-6-fluoropyridin-3-ol (CAS 1227602-47-2)
- 2-Amino-3-fluoro-5-hydroxypyridine (CAS 1227595-77-8)
- N-(3-ethoxypropyl)-2-methylcyclohexan-1-amine (CAS 1020965-50-7)
- Methyl 2-chloro-7-hydroxybenzo[b]thiophene-6-carboxylate (CAS 2090603-91-9)
- 3-(2-Fluorophenyl)-1-(1,2,3,4-tetrahydroquinolin-5-yl)urea (CAS 1016498-13-7)
- tert-Butyl 4-[3-cyano-6-(pyrazin-2-yl)pyridin-2-yl]-1,4-diazepane-1-carboxylate (CAS 946385-94-0)
- 1H-Naphtho[1,2-d]imidazol-2-amine (CAS 94785-93-0)
- 2-Amino-5-(trifluoromethyl)phenylboronic Acid Pinacol Ester (CAS 1058062-64-8)
- 3-Chloro-2-(hydroxymethyl)-6,7-dihydropyrazolo[1,5-a]pyrazin-4(5H)-one (CAS 1382786-15-3)
- N-(2-Bromo-4-methylphenyl)cyclohexanecarboxamide (CAS 158174-52-8)
- (5-(((Tert-butyldimethylsilyl)oxy)methyl)furan-2-yl)boronic acid (CAS 1072952-55-6)
- Semaglutide impurity 106 (CAS CATO-C4X-2226106)
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