5-Bromopyridin-2(1H)-one CAS 49843-23-4
| CAS No. | 49843-23-4 |
| Molecular Formula | C5H4BrNO |
| Molecular Weight | 174.00 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-Bromopyridin-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.
5-Bromopyridin-2(1H)-one (CAS 49843-23-4), molecular formula C5H4BrNO and molecular weight 174.00 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C5H4BrNO, 5-Bromopyridin-2(1H)-one 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 174.00 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).
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.
Physical & Chemical Properties
| Molecular Formula | C5H4BrNO |
| Molecular Weight | 174.00 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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.) | 1971 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
Related Bromopyridin Standards
- 3-Bromopyridin-4(1H)-one (CAS 70149-39-2)
- 6-bromopyridin-2-ol (CAS 27992-32-1)
- 2-bromopyridin-4-amine (CAS 7598-35-8)
- 4-Bromopyridin-2(1H)-One (CAS 947407-84-3)
- (6-Bromopyridin-2-yl)methanamine (CAS 188637-63-0)
- (3-Bromopyridin-2-yl)hydrazine (CAS 54231-41-3)
- 2-(4-Bromopyridin-3-yl)acetonitrile (CAS 1211539-87-5)
- 2-(3-Bromopyridin-2-yl)acetonitrile (CAS 122851-60-9)
Recommended Standards
- 5-Bromopyridazin-4-amine (CAS 55928-90-0)
- 6-Bromo-3-pyridinol (CAS 55717-45-8)
- 5-Bromo-1H-pyrrole-3-carbaldehyde (CAS 881676-32-0)
- 6-Bromopyrazin-2-amine (CAS 54237-53-5)
- 4-Chloro-5,7-dimethylquinoline (CAS 352205-97-1)
- Ethyl 1-isobutyl-5-methyl-1H-imidazole-4-carboxylate (CAS 1710695-88-7)
- (R)-alpha-Methyl-3-(trifluoromethyl)benzyl Alcohol (CAS 127852-24-8)
- tert-Butyl 3-((3-iodo-6-(pyrrolidin-1-yl)pyridin-2-yloxy)methyl)pyrrolidine-1-carboxylate (CAS 1228665-81-3)
- 3-Chloro-2-fluoro-4-(trifluoromethyl)benzaldehyde (CAS 134099-21-1)
- Methyl 2-methyl-4-oxocyclohex-2-enecarboxylate (CAS 35490-07-4)
- 4-(3-(3-(Trifluoromethyl)phenyl)-1H-pyrazol-5-yl)piperidine (CAS 1030385-98-8)
- 2-(2-(2-(1-(4-Methoxyphenyl)ethylidene)hydrazinyl)-4-oxo-4,5-dihydrothiazol-5-yl)acetic acid (CAS 78381-99-4)
- Bis(1-[2-(pyridin-2-yloxy)phenyl]methanamine) trihydrochloride (CAS 2034207-73-1)
- [3-31]-Semaglutide D (Sodium salt) (CAS CATO-C4X-2226119)
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