3-Chloro-1-(isoxazol-5-yl)propan-1-one CAS 357405-31-3
| CAS No. | 357405-31-3 |
| Molecular Formula | C6H6ClNO2 |
| Molecular Weight | 159.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Chloro-1-(isoxazol-5-yl)propan-1-one (CAS 357405-31-3) is a high-purity analytical reference standard with the molecular formula C6H6ClNO2 and a molecular weight of 159.57 g/mol.
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 3-Chloro-1-(isoxazol-5-yl)propan-1-one is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 159.57 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.
As a certified reference material (CRM), 3-Chloro-1-(isoxazol-5-yl)propan-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.
Physical & Chemical Properties
| Molecular Formula | C6H6ClNO2 |
| Molecular Weight | 159.57 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chloro Standards
- 2-(4-Chloro-1H-pyrazol-1-yl)acetamide (CAS 1006506-31-5)
- 6-Chloro-4-methoxypyridine-2(1H)-one (CAS 108279-65-8)
- 3-Chloro-5-methoxypyridine 1-oxide (CAS 110038-48-7)
- 5-Chloro-1-methyl-1H-pyrazole-4-carboxamide (CAS 110763-18-3)
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- 6-Chloro-2-methoxypyridin-3-ol (CAS 1196146-98-1)
- 4-Chloro-6-methoxypyridin-3-ol (CAS 1196152-16-5)
Recommended Standards
- 3-Chloro-1-(isoxazol-3-yl)propan-1-one (CAS 357405-87-9)
- 3-Ethylisoxazole-5-carbonyl chloride (CAS 80173-67-7)
- 2-Chloro-N-(1H-imidazol-2-yl)acetamide (CAS 52737-43-6)
- 4,5-Dimethyloxazole-2-carbonyl chloride (CAS 344399-17-3)
- 1-[(2S)-pyrrolidin-2-yl]propan-1-one hydrochloride (CAS 1261486-13-8)
- n-(3-Ethoxypropyl)-3-methylcyclohexan-1-amine (CAS 1021129-13-4)
- 2-Methyl-6-(1H-1,2,4-triazol-1-yl)pyrazolo[1,5-a]pyrimidin-7-ol (CAS 861209-57-6)
- 2,3-Diphenylpyrazolo[1,5-a]pyrimidine-6-carbaldehyde (CAS 1235439-22-1)
- 4-Bromo-N-tert-butyl-N-[(4-methoxyphenyl)methyl]benzene-1-sulfonamide (CAS 1881330-94-4)
- 2-Hydroxy-5-propylbenzaldehyde (CAS 81323-69-5)
- 4-(3-Oxo-3-phenylprop-1-en-1-yl)benzene-1-sulfonyl chloride (CAS 7454-09-3)
- 2-(3-Butyl-1H-inden-2-yl)-N,N-dimethylethan-1-amine hydrobromide (CAS 1346599-23-2)
- Abt-046 (CAS 1031336-60-3)
- Semaglutide Impurity 10 (CAS CATO-C4X-222610)
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