3-Methyl-5-(pyridazin-4-yl)isoxazole CAS 39123-41-6
| CAS No. | 39123-41-6 |
| Molecular Formula | C8H7N3O |
| Molecular Weight | 161.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 3-Methyl-5-(pyridazin-4-yl)isoxazole (CAS 39123-41-6), a certified reference material (molecular formula C8H7N3O, MW 161.16 g/mol) for analytical method development and quality control.
Based on its molecular formula C8H7N3O, 3-Methyl-5-(pyridazin-4-yl)isoxazole contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 161.16 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.
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 | C8H7N3O |
| Molecular Weight | 161.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- 1-(Pyridazin-3-yl)-1H-pyrazol-5-amine (CAS 69720-74-7)
- 5-(Pyridazin-4-yl)-1H-pyrazol-3-amine (CAS 2763703-89-3)
- 3-(Pyridazin-4-yl)isoxazol-5-ol (CAS 51149-14-5)
- 1-(Pyridazin-3-yl)cyclopropane-1-carboxylic acid (CAS 1469287-08-8)
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- 1-(Pyridazin-3-yl)pyrrolidin-3-ol (CAS 1340179-55-6)
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Recommended Standards
- 3-Methyl-5-(pyrazin-2-yl)isoxazole (CAS 457654-03-4)
- 3-Methylbenzo[d][1,2,3]triazin-4(3H)-one (CAS 22305-44-8)
- 3-Methyl-4h-pyrido[2,1-c][1,2,4]triazin-4-one (CAS 33919-37-8)
- 3-Methylbenzo[d]isoxazole-5-carbaldehyde (CAS 648448-98-0)
- 2-(4-Cyanophenyl)-N-methylacetamide (CAS 79149-59-0)
- Benzyl 4'-methyl[1,1'-biphenyl]-2-yl ether (CAS 893737-28-5)
- Ethyl 1-(5-formylpyridin-2-yl)piperidine-4-carboxylate (CAS 886360-68-5)
- Ethyl 3-acetamido-5-bromo-1H-pyrazole-4-carboxylate (CAS 1017802-87-7)
- 1-Methyl-5,6,7,8-tetrahydro-3,4-phenanthrenedione (CAS 127791-78-0)
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