4-Bromo-5-(2-chloro-4-methoxyphenyl)isoxazole-3-carboxylic acid CAS 1188191-28-7
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 1188191-28-7 |
| Molecular Formula | C11H7BrClNO4 |
| Molecular Weight | 332.53 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Bromo-5-(2-chloro-4-methoxyphenyl)isoxazole-3-carboxylic acid (CAS 1188191-28-7) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C11H7BrClNO4. Molecular weight: 332.53 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C11H7BrClNO4 |
| Molecular Weight | 332.53 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 sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; 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.) | 1989 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 1 |
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- Semaglutide impurity 229 (CAS CATO-C4X-2226229)
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