Isoxazolo[5,4-b]pyridine CAS 272-03-7
| CAS No. | 272-03-7 |
| Molecular Formula | C6H4N2O |
| Molecular Weight | 120.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 120.11 g/mol gives Isoxazolo[5,4-b]pyridine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Isoxazolo[5,4-b]pyridine (CAS 272-03-7) is a high-purity analytical reference standard with the molecular formula C6H4N2O and a molecular weight of 120.11 g/mol.
Based on its molecular formula C6H4N2O, Isoxazolo[5,4-b]pyridine contains an amide group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 120.11 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.
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 | C6H4N2O |
| Molecular Weight | 120.11 g/mol |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
Related Isoxazolo Standards
- Isoxazolo[4,3-b]pyridine (CAS 173894-73-0)
- Isoxazolo[4,5-b]pyridine (CAS 76807-98-2)
- Isoxazolo[5,4-c]pyridine (CAS 64761-69-9)
- Isoxazolo[3,4-d]pyrimidine (CAS 28648-19-3)
- Isoxazolo[4,3-d]pyrimidine (CAS 272-58-2)
- Isoxazolo[5,4-d]pyrimidine (CAS 272-04-8)
- Isoxazolo[4,5-b]pyridin-3-amine (CAS 114080-93-2)
- Isoxazolo[5,4-c]pyridin-3-amine (CAS 114080-94-3)
Recommended Standards
- Imidazo[5,1-c][1,2,4]triazine (CAS 52965-39-6)
- Oxazolo[4,5-b]pyridine (CAS 273-97-2)
- Imidazo[1,5-d][1,2,4]triazine (CAS 68457-59-0)
- Oxazolo[4,5-c]pyridine (CAS 273-56-3)
- Tert-butyl (R)-6-(1-aminoethyl)-3,4-dihydro-1,5-naphthyridine-1(2H)-carboxylate (CAS 2387565-59-3)
- 2-Amino-N-cyclopropyl-2-thioxoacetamide (CAS 1334149-71-1)
- N,n-Diethyl-2-(3-formyl-1h-indol-1-yl)acetamide (CAS 347320-56-3)
- 4-Cyano-2-iodobenzoic acid (CAS 1260814-20-7)
- 5-Chloro-1H-pyrazolo[3,4-b]pyridine (CAS 1240725-66-9)
- 2-Amino-4-(2-chlorophenyl)-6-(4-chlorophenyl)-5-methylnicotinonitrile (CAS 344264-24-0)
- 2-Bromo-6-chloronicotinic acid (CAS 1060815-61-3)
- 4-Amino-3-(propan-2-yloxy)benzonitrile (CAS 1369783-66-3)
- 1-(4-((4-Fluorobenzyl)oxy)phenyl)ethan-1-one (CAS 72293-96-0)
- Semaglutide impurity 40 (CAS CATO-C4X-222640)
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