5-Bromopyridazin-3(2H)-one CAS 67264-08-8
| CAS No. | 67264-08-8 |
| Molecular Formula | C4H3BrN2O |
| Molecular Weight | 174.98 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amide group, a hydroxyl group, an ether linkage, bromine substitution, 5-Bromopyridazin-3(2H)-one is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 174.98 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
CATO supplies 5-Bromopyridazin-3(2H)-one (CAS 67264-08-8), a certified reference material (molecular formula C4H3BrN2O, MW 174.98 g/mol) for analytical method development and quality control.
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), 5-Bromopyridazin-3(2H)-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 | C4H3BrN2O |
| Molecular Weight | 174.98 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.) | 1976 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromopyridazin Standards
- 5-Bromopyridazin-4-ol (CAS 1784428-43-8)
- 6-Bromopyridazin-4-ol (CAS 1956385-67-3)
- 4-Bromopyridazin-3(2H)-one (CAS 22626-56-8)
- 6-Bromopyridazin-3(2H)-one (CAS 51355-94-3)
- 4-Bromopyridazin-3-amine (CAS 1353101-33-3)
- 6-Bromopyridazin-4-amine (CAS 1379294-26-4)
- 3-Bromopyridazin-4-amine (CAS 55928-84-2)
- 5-Bromopyridazin-4-amine (CAS 55928-90-0)
Recommended Standards
- 5-Bromofuran-3-carbaldehyde (CAS 63387-54-2)
- 5-Bromopyrimidine 1-oxide (CAS 36529-69-8)
- 5-Bromo-4(3H)-pyrimidone (CAS 19808-30-1)
- 5-Bromo-2H-pyran-2-one (CAS 19978-33-7)
- 1-Azabicyclo[3.2.0]heptane-5-methanol, 3-(difluoromethyl)-, (3S,5R)- (CAS 2927440-98-8)
- 4-Bromo-5-chloro-6-(difluoromethyl)picolinonitrile (CAS 1805005-31-5)
- (S)-1-(2-(Aminomethyl)phenyl)-2,2,2-trifluoroethan-1-amine (CAS 1228560-99-3)
- 6-PIperidin-3-yl-n-1,3-thiazol-2-ylnicotinamide dihydrochloride (CAS 1858255-39-6)
- Thalidomide-5'-O-C5-acid (CAS 2226299-21-2)
- 2-Hexylundecanoic acid (CAS 72056-18-9)
- 7-(4-Ethylphenyl)-2-methylthiazolo[4,5-d]pyridazin-4-ol (CAS 1105192-17-3)
- 4-Amino-2-chloro-3-fluorobenzoic acid (CAS 1124214-25-0)
- Methotrexate Impurity 68 (CAS CATO-C4X-115468)
- Glucagon-like peptide 2 (CAS 89750-15-2)
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