2-Chloro-1-(isoxazol-3-yl)ethanone CAS 90251-23-3
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 90251-23-3 |
| Molecular Formula | C5H4ClNO2 |
| Molecular Weight | 145.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Chloro-1-(isoxazol-3-yl)ethanone (CAS 90251-23-3) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C5H4ClNO2. Molecular weight: 145.54 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C5H4ClNO2 |
| Molecular Weight | 145.54 g/mol |
| 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 |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
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Recommended Standards
- 1-(3-Chloroisoxazol-5-yl)ethan-1-one (CAS 80403-94-7)
- 2-Chloro-3-hydroxypyridine 1-oxide (CAS 30810-20-9)
- (E)-N-[(5-chlorofuran-2-yl)methylidene]hydroxylamine (CAS 54376-27-1)
- n-(1-Methoxypropan-2-yl)nonan-2-amine (CAS 1039932-16-5)
- Methylergometrine EP Impurity G (CAS 5793-04-4)
- 1-Phenyl-4-[3-(trifluoromethyl)pyridine-2-carbonyl]piperazine (CAS 1092346-39-8)
- N-benzyl-2-(4-nitrophenyl)-6-phenylpyrimidin-4-amine (CAS 352224-37-4)
- 1-(6-Chloro-1H-indol-3-yl)propan-1-one (CAS 1002331-94-3)
- 6-bromo-[1,2,4]triazolo[1,5-a]pyridine-8-carboxylic acid (CAS 1899934-22-5)
- Semaglutide impurity 59 (CAS CATO-C4X-222659)
Why CATO?
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