1-(3-(2,4-Dichlorophenyl)isoxazol-5-yl)ethan-1-one CAS 175277-34-6
| CAS No. | 175277-34-6 |
| Molecular Formula | C11H7Cl2NO2 |
| Molecular Weight | 256.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
1-(3-(2,4-Dichlorophenyl)isoxazol-5-yl)ethan-1-one (CAS 175277-34-6), molecular formula C11H7Cl2NO2 and molecular weight 256.08 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 1-(3-(2,4-Dichlorophenyl)isoxazol-5-yl)ethan-1-one (C11H7Cl2NO2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 256.08 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C11H7Cl2NO2 |
| Molecular Weight | 256.08 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2007 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Dichlorophenyl Standards
- 5-(2,4-Dichlorophenyl)furan-2-carboxamide (CAS 1030536-67-4)
- 4-(2,6-Dichlorophenyl)-1h-pyrrole-3-carboxylic acid (CAS 1096815-63-2)
- 1-(2,6-Dichlorophenyl)-1h-pyrrole-2-carboxylic acid (CAS 1478682-01-7)
- 3-(2,6-dichlorophenyl)-1H-pyrrole-2-carboxylic acid (CAS 1520810-96-1)
- 1-(3-(3,4-Dichlorophenyl)isoxazol-5-yl)ethan-1-one (CAS 175277-36-8)
- 1-(2,5-Dichlorophenyl)-1H-pyrrole-2-carboxylic acid (CAS 896051-94-8)
- 1-(3,4-Dichlorophenyl)-1H-pyrrole-2-carboxylic acid (CAS 952959-42-1)
- 1-(3,4-dichlorophenyl)-3-methylenedihydro-1H-pyrrole-2,5-dione (CAS 63233-85-2)
Recommended Standards
- (R)-4-(2-Iodoethyl)-2,2-dimethyl-1,3-dioxolane (CAS 165657-74-9)
- 2,4-Dichloro-6-methoxyquinoline-3-carbaldehyde (CAS 151772-24-6)
- 1-(ethoxymethyl)-2-iodo-1H-imidazole (CAS 146697-87-2)
- 1-(3,5-Dichlorophenyl)-1H-pyrrole-2-carboxylic acid (CAS 773869-18-4)
- 4-Bromo-3-hydroxy-2-naphthaldehyde (CAS 75965-69-4)
- BIS THF HNS Derivative 1 (CAS 253265-98-4)
- 6-(Difluoromethyl)-5-iodopyrimidin-4(3H)-one (CAS 1706461-35-9)
- Tert-butyl (1R,4S,5R)-5-formyl-2-azabicyclo[2.2.1]Heptane-2-carboxylate (CAS 2166012-43-5)
- 2-(4-(Methylthio)phenyl)-N-(4-(pyridin-2-yl)thiazol-2-yl)acetamide (CAS 941883-07-4)
- 2-(5-Oxazolyl)benzylamine (CAS 1261268-75-0)
- 2-Fluoro-N-(2-(thiophen-3-yl)benzyl)benzenesulfonamide (CAS 1796947-56-2)
- Pretomanid Impurity 24 (CAS CATO-C4X-260624)
- 4-[4-(4-Methoxyphenyl)pyrimidin-2-yl]phenol (CAS 477846-93-8)
- Tirzepatide Impurity 34 (CAS CATO-C4X-324034)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com