3-(4-Bromophenyl)-5-(3-chlorophenyl)isoxazole CAS 651021-75-9
| CAS No. | 651021-75-9 |
| Molecular Formula | C15H9BrClNO |
| Molecular Weight | 334.60 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-(4-Bromophenyl)-5-(3-chlorophenyl)isoxazole (CAS 651021-75-9), molecular formula C15H9BrClNO and molecular weight 334.60 g/mol, is a CATO reference standard with documented purity and traceability.
3-(4-Bromophenyl)-5-(3-chlorophenyl)isoxazole (C15H9BrClNO) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine/bromine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
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 | C15H9BrClNO |
| Molecular Weight | 334.60 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 |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 1 |
Related Bromophenyl Standards
- 5-(3-Bromophenyl)-3-(4-chlorophenyl)isoxazole (CAS 651021-67-9)
- N-(4-bromophenyl)-7-chloroquinazolin-4-amine (CAS 477856-29-4)
- 5309-35-3 N'-[(3-Bromophenyl)methylidene]-4-oxo-3,4,5,6,7,8-hexahydro[1]benzothieno[2,3-d]pyrimidine-2-carbohydrazide DTXSID60361326 (CAS 5309-35-3)
- N-(3-bromophenyl)adamantane-1-carboxamide (CAS 400006-85-1)
- 4-((4-Bromophenyl)sulfonyl)-2-ethylmorpholine (CAS 1119390-07-6)
- 2-(4-Bromophenyl)-4-(ethylthio)pyrazolo[1,5-a]pyrazine (CAS 1207007-76-8)
- 2-(4-Bromophenyl)-3-phenylthiazolidin-4-one (CAS 128914-28-3)
- 2-(2-Bromophenyl)-6-fluoro-4,4-dimethyl-1,2,3,4-tetrahydroquinoline (CAS 1384264-68-9)
Recommended Standards
- 6-Bromo-4-(4-chlorophenyl)quinolin-2(1H)-one (CAS 1416439-09-2)
- Resmetirom Impurity 102 (CAS CATO-C4X-2912102)
- 5-Bromo-2-(4-chlorophenyl)-1H-indole-3-carbaldehyde (CAS 587828-26-0)
- Ethyl 3-(4-bromo-2-chlorobenzamido)propanoate (CAS 1252340-18-3)
- 8-Fluorodibenzo[b,d]furan-4-ol (CAS 2128707-85-5)
- (S)-3,5-difluoro-4-(pyrrolidin-2-yl)aniline (CAS 1213008-34-4)
- 2-Methyl-5-oxo-4-(p-tolyl)-5H-indeno[1,2-b]pyridine-3-carbonitrile (CAS 439108-78-8)
- Tris(3-methoxypropyl)phosphine (CAS 83622-85-9)
- tert-Butyl 3-{[3-(1h-imidazol-1-yl)propyl]amino}propanoate (CAS 1221341-66-7)
- 1-Methyl-2-(2-methylcyclopropyl)-1H-benzo[d]imidazole (CAS 167483-60-5)
- Doxapram Impurity 33 (CAS CATO-C4X-197333)
- 3-(m-Tolyl)pyrrolidine hydrochloride (CAS 1187172-21-9)
- 5-(Benzenesulfonyl)-4-(4-methyl-2-phenyl-1,3-thiazol-5-yl)-2-(thiophen-2-yl)pyrimidine (CAS 866017-83-6)
- Copper Peptide ·2 acetate salt (CAS 130120-57-9)
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