1-(5-Methylisoxazol-4-yl)ethan-1-one CAS 6497-21-8
| CAS No. | 6497-21-8 |
| Molecular Formula | C6H7NO2 |
| Molecular Weight | 125.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 1-(5-Methylisoxazol-4-yl)ethan-1-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.
1-(5-Methylisoxazol-4-yl)ethan-1-one (CAS 6497-21-8) is a high-purity analytical reference standard with the molecular formula C6H7NO2 and a molecular weight of 125.13 g/mol.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 1-(5-Methylisoxazol-4-yl)ethan-1-one is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 125.13 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C6H7NO2 |
| Molecular Weight | 125.13 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related Methylisoxazol Standards
- 1-(3-methylisoxazol-5-yl)ethan-1-one (CAS 55086-61-8)
- 1-(5-Methylisoxazol-3-yl)ethanone (CAS 24068-54-0)
- N-(5-Methylisoxazol-4-yl)formamide (CAS 100499-62-5)
- 3-Ethyl-4-methylisoxazol-5-amine (CAS 153458-34-5)
- (S)-1-(3-methylisoxazol-5-yl)ethan-1-amine (CAS 1565819-65-9)
- 4-Ethyl-5-methylisoxazol-3-amine (CAS 177266-03-4)
- (R)-1-(5-Methylisoxazol-3-yl)ethan-1-amine (CAS 1808068-52-1)
- (R)-1-(3-methylisoxazol-5-yl)ethan-1-amine (CAS 2227844-82-6)
Recommended Standards
- 1-(Furan-2-yl)ethan-1-one oxime (CAS 5007-50-1)
- 1-(5-Aminofuran-2-yl)ethanone (CAS 56703-73-2)
- 1,3-Dimethyl-1H-1,2,4-triazole-5-carbaldehyde (CAS 877131-01-6)
- 1-(4-methyloxazol-5-yl)ethanone (CAS 23012-19-3)
- 3-(2-(Ethylsulfonyl)cyclopropyl)aniline (CAS 1707584-04-0)
- n1,n1,3-Trimethylbutane-1,2-diamine (CAS 773045-76-4)
- tert-Butyl 4-(azetidin-1-yl)piperidine-1-carboxylate (CAS 1093066-82-0)
- 1,2-Benzenedicarboxylic Acid Di-C6,8,10-Alkyl Esters (CAS 68515-51-5)
- 2-(4-Methylpiperazin-1-yl)-1-phenylethan-1-amine (CAS 775349-54-7)
- (4-Cyclobutylpyridin-3-yl)methanamine hydrochloride (CAS 2490705-18-3)
- 1-(1,3-Difluoro-2-propanyl)piperazine (CAS 772330-41-3)
- 3-[(2-Methoxybenzyl)sulfonyl]pyrrolidine hydrochloride (CAS 1982761-09-0)
- 2-Methyl-1-pentyl-3-(4-methoxynaphthoyl)indole-d11 (CAS 1346604-97-4)
- Semaglutide Impurity 82 (CAS CATO-C4X-222682)
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