6-Ethyl-3-methyl-4-phenylisoxazolo[3,4-d]pyridazin-7(6H)-one CAS 189306-91-0
| CAS No. | 189306-91-0 |
| Molecular Formula | C14H13N3O2 |
| Molecular Weight | 255.27 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
6-Ethyl-3-methyl-4-phenylisoxazolo[3,4-d]pyridazin-7(6H)-one (CAS 189306-91-0), molecular formula C14H13N3O2 and molecular weight 255.27 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, 6-Ethyl-3-methyl-4-phenylisoxazolo[3,4-d]pyridazin-7(6H)-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 255.27 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C14H13N3O2 |
| Molecular Weight | 255.27 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2011 |
| Nitrogen Atoms | 3 |
Recommended Standards
- 6-(4-Methoxyphenyl)-2-methylimidazo[1,2-a]pyrazin-3(2H)-one (CAS 185311-71-1)
- (9H-Fluoren-9-yl)methyl hydroxycarbamate (CAS 190656-01-0)
- 1-(tert-Butyl) 3-ethyl 5-amino-1H-pyrazole-1,3-dicarboxylate (CAS 183288-92-8)
- 2-(o-Tolylcarbamoyl)benzoic acid (CAS 19336-68-6)
- 5-Acetyl-6-methyl-4-propyl-3,4-dihydropyrimidin-2(1H)-one (CAS 339360-13-3)
- 2-Amino-1-methyl-5-nitrobenzimidazole Hydrobromide (CAS 1261079-64-4)
- 2,5,6-Trifluoropyrimidin-4-amine (CAS 697-85-8)
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- 6-Chloro-3,3-dimethyl-1H-pyrrolo[2,3-b]pyridin-2(3H)-one (CAS 1581754-84-8)
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