5-Methylisoxazole-3-carbonyl chloride 5-methyl-isoxazole-3-carbonyl chloride 5-methyl-1,2-oxazole-3-carbonyl chloride 39499-34-8 CAS 39499-34-8
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 39499-34-8 |
| Molecular Formula | C5H4ClNO2 |
| Molecular Weight | 145.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Methylisoxazole-3-carbonyl chloride 5-methyl-isoxazole-3-carbonyl chloride 5-methyl-1,2-oxazole-3-carbonyl chloride 39499-34-8 (CAS 39499-34-8) is a high-purity pharmaceutical standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C5H4ClNO2. Molecular weight: 145.54 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
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.) | 1968 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Methylisoxazole Standards
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- 5-Methylisoxazole-3-carbothioamide (CAS 77358-26-0)
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- Methyl 3-methylisoxazole-5-carboxylate (CAS 1004-96-2)
- 3-Methylisoxazole-4-acetic Acid (CAS 1008304-86-6)
Recommended Standards
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- tert-Butyl (6-chloro-2-methyl-3-oxo-2,3-dihydropyridazin-4-yl)carbamate (CAS 2680821-04-7)
- 4-Bromo-7-chloro-3-iodo-1H-pyrrolo[3,2-c]pyridine (CAS 1000341-91-2)
- N,N-dimethyl-1-(4-(piperidin-2-yl)phenyl)methanamine (CAS 1177342-76-5)
- Tirzepatide Impurity 35 (CAS CATO-C4X-324035)
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 13829788188 / jacky.chen@cato-chem.com