4-(3-Methylisoxazol-5-yl)furan-2(5H)-one CAS 175687-55-5
| CAS No. | 175687-55-5 |
| Molecular Formula | C8H7NO3 |
| Molecular Weight | 165.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-(3-Methylisoxazol-5-yl)furan-2(5H)-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.
4-(3-Methylisoxazol-5-yl)furan-2(5H)-one (CAS 175687-55-5), molecular formula C8H7NO3 and molecular weight 165.15 g/mol, is a CATO reference standard with documented purity and traceability.
4-(3-Methylisoxazol-5-yl)furan-2(5H)-one (C8H7NO3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C8H7NO3 |
| Molecular Weight | 165.15 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, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2007 |
| Nitrogen Atoms | 1 |
Related Methylisoxazol Standards
- 5-(5-Methylisoxazol-3-yl)penta-2,4-dien-1-ol (CAS 113824-17-2)
- N-(5-Methylisoxazol-4-yl)butyrimidamide (CAS 122686-21-9)
- N-(5-Methylisoxazol-4-yl)isobutyrimidamide (CAS 122686-22-0)
- 5-(5-Methylisoxazol-3-yl)-1,3,4-oxadiazol-2-amine (CAS 725698-89-5)
- N-((5-Methylisoxazol-3-yl)methyl)acrylamide (CAS 1248224-66-9)
- (S)-5-(3-Methylisoxazol-5-yl)pyrrolidin-2-one (CAS 163849-08-9)
- N-(3-Methylisoxazol-4-yl)cyclopropanecarboxamide (CAS 72592-16-6)
- N-(3-Methylisoxazol-5-yl)methacrylamide (CAS 86685-07-6)
Recommended Standards
- 4-Methoxy-3-methylisoxazolo[5,4-d]pyrimidine (CAS 175348-25-1)
- 2-Oxo-3-(pyridin-2-yl)propanoic acid (CAS 175733-76-3)
- 3-Ethylisoxazolo[5,4-d]pyrimidin-4(5H)-one (CAS 175348-11-5)
- 5-Hydroxy-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 177210-33-2)
- 4-Amino-N-benzylbenzenesulfonamide (CAS 1709-54-2)
- 3-(Tert-butyl)-2-hydroxy-5-methylbenzaldehyde (CAS 41715-31-5)
- 2-(Azocan-1-yl)acetonitrile (CAS 84803-55-4)
- Ethyl 5-amino-2-phenyl-3-sulfanylidene-2,3-dihydro-1,2-thiazole-4-carboxylate (CAS 380442-79-5)
- Diisooctyl terephthalate (CAS 27937-24-2)
- 2,6-Dimethyl-3-(2,3-dimethylphenyl)propiophenone (CAS 898792-80-8)
- 4-Iodo-1H-indole-6-carboxylic acid (CAS 724450-23-1)
- Methyl 2-acetyl-3-ethoxypent-4-ynoate (CAS 343333-28-8)
- (R)-3-(Boc-amino)-5-(tert-butoxy)-5-oxopentanoic Acid (CAS 128135-39-7)
- Semaglutide impurity 274 (CAS CATO-C4X-2226274)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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