3-Chloroisoxazolo[4,5-b]pyridine CAS 1784989-11-2
| CAS No. | 1784989-11-2 |
| Molecular Formula | C6H3ClN2O |
| Molecular Weight | 154.55 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
3-Chloroisoxazolo[4,5-b]pyridine (CAS 1784989-11-2), molecular formula C6H3ClN2O and molecular weight 154.55 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C6H3ClN2O, 3-Chloroisoxazolo[4,5-b]pyridine contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 154.55 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).
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 | C6H3ClN2O |
| Molecular Weight | 154.55 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloroisoxazolo Standards
- 6-Chloroisoxazolo[4,5-c]pyridine (CAS 1206974-80-2)
- 4-Chloroisoxazolo[4,5-c]pyridine (CAS 1211525-22-2)
- 3-Chloroisoxazolo[5,4-b]pyridine (CAS 864871-89-6)
- 4-Chloroisoxazolo[5,4-d]pyrimidine (CAS 1094507-12-6)
- 4-Chloroisoxazolo[4,5-c]pyridin-3-amine (CAS 1242515-54-3)
- 5-Chloroisoxazolo[4,5-b]pyridin-3-amine (CAS 1369102-27-1)
- 6-Chloroisoxazolo[5,4-b]pyridin-3-amine (CAS 1502034-41-4)
- 6-Chloroisoxazolo[4,5-c]pyridin-3-amine (CAS 2089292-10-2)
Recommended Standards
- 5-Chloro-6-oxo-1,6-dihydropyridine-2-carbonitrile (CAS 1784430-76-7)
- 6-Chloro-4-hydroxynicotinonitrile (CAS 1805113-34-1)
- 7-Chlorooxazolo[4,5-b]pyridine (CAS 1782851-31-3)
- 5-Chloro-2-oxo-1,2-dihydropyridine-4-carbonitrile (CAS 1805113-40-9)
- N-Aminocarbonyl Felbamate (CAS 1797130-34-7)
- Ethyl 4,4,4-trifluoro-3-hydroxy-2-((3-(trifluoromethyl)phenyl)diazenyl)but-2-enoate (CAS 866130-98-5)
- Ethyl 2-amino-4-(2-ethyl-1h-imidazol-1-yl)butanoate (CAS 1343579-78-1)
- 6,7-Dimethyl-2-(pyridin-4-yl)indoline (CAS 591720-54-6)
- 2,2',3,4,4',5,6-Heptabromodiphenyl Ether (CAS 189084-67-1)
- 4-cyclopropyl-2-methylpyrimidin-5-amine (CAS 1368136-90-6)
- 1-((3-Acetoxy-4-methyl-2-oxo-2H-chromen-7-yl)amino)-2,5-dioxopyrrolidine-3-sulfonic acid (CAS 152305-86-7)
- 4-Hydroxy estrone 1-N7-guanine (CAS 178971-92-1)
- 4-(5-Chloro-2-methylphenyl)piperidine (CAS 262272-28-6)
- D-[His]1-Semaglutide (CAS CATO-C4X-222652)
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