2-Bromo-3-methoxypyrazine CAS 1209905-41-8
| CAS No. | 1209905-41-8 |
| Molecular Formula | C5H5BrN2O |
| Molecular Weight | 189.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2-Bromo-3-methoxypyrazine is closely related to an amide group, a hydroxyl group, an ether linkage, bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
2-Bromo-3-methoxypyrazine (CAS 1209905-41-8), molecular formula C5H5BrN2O and molecular weight 189.01 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C5H5BrN2O, 2-Bromo-3-methoxypyrazine contains an amide group, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 189.01 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), 2-Bromo-3-methoxypyrazine 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 | C5H5BrN2O |
| Molecular Weight | 189.01 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 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 | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 5-Bromo-3-methylpyrazin-2-ol (CAS 100047-56-1)
- 2-Bromo-5-hydrazinylpyrazine (CAS 1001050-24-3)
- (4-bromo-1H-pyrazol-1-yl)acetaldehyde (CAS 1007550-84-6)
- 6-Bromo-2-methyl-3(2H)-pyridazinone (CAS 1123169-25-4)
- 2-Bromo-5-hydrazinylpyrimidine (CAS 1174413-61-6)
- 3-Bromo-1-methylpyrazin-2(1H)-one (CAS 1187017-25-9)
- 2-Bromo-5-methoxypyrimidine (CAS 1209459-99-3)
- 4-Bromo-5-methoxypyrimidine (CAS 1211184-80-3)
Recommended Standards
- (6-Bromopyrazin-2-yl)methanol (CAS 1209458-06-9)
- 5-Bromo-1-methyl-1H-pyrazole-4-carbaldehyde (CAS 1211505-84-8)
- 6-Amino-2-bromo-pyridin-3-ol (CAS 1187930-22-8)
- 3-Bromo-5-cyclopropyl-1,2,4-oxadiazole (CAS 121562-08-1)
- (2,2,3,3,3-Pentafluoropropyl)benzene (CAS 78693-66-0)
- 5-(4-Methoxyphenyl)thiophene-2-carbohydrazide (CAS 69202-24-0)
- Methyl (R)-3-Bromo-2-methylpropanoate (CAS 110556-33-7)
- N-Nitroso Adenine (CAS 2615274-45-6)
- 5-Bromo-N-propyl-2-pyrimidinamine (CAS 1187385-92-7)
- (R)-3-((tert-butoxycarbonyl)amino)-2-(2,4,5-trimethoxybenzyl)propanoic acid (CAS 1260618-66-3)
- Dimethyl (S)-(2-methylaziridin-1-yl)phosphonate (CAS 1800100-62-2)
- 2-({[(9h-fluoren-9-yl)methoxy]carbonyl}amino)-6-methylbenzoic acid (CAS 870150-57-5)
- 1-(2-(Dimethylamino)ethyl)cyclohexan-1-amine (CAS 1344017-98-6)
- Exenatide (CAS 141758-74-9（free base）)
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