Ethyl 5-cyano-4,5-dihydroisoxazole-3-carboxylate CAS 40499-67-0
| CAS No. | 40499-67-0 |
| Molecular Formula | C7H8N2O3 |
| Molecular Weight | 168.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Ethyl 5-cyano-4,5-dihydroisoxazole-3-carboxylate (CAS 40499-67-0) is a high-purity analytical reference standard with the molecular formula C7H8N2O3 and a molecular weight of 168.15 g/mol.
Based on its molecular formula C7H8N2O3, Ethyl 5-cyano-4,5-dihydroisoxazole-3-carboxylate contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 168.15 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), Ethyl 5-cyano-4,5-dihydroisoxazole-3-carboxylate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C7H8N2O3 |
| Molecular Weight | 168.15 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
- 4-Cyano-3-(difluoromethyl)-2-methylpyridine (CAS 1804759-49-6)
- 4-Cyano-3-(difluoromethyl)-5-methylpyridine (CAS 1806764-61-3)
- 4-Cyano-2,5-difluorobenzyl amine (CAS 433940-06-8)
- Methyl 2-cyano-1,3-thiazole-5-carboxylate (CAS 1211541-45-5)
- 4-Cyano-1-methylpiperidine-4-carboxylic acid (CAS 1542938-62-4)
- 4-Cyano-3-methylisoquinoline (CAS 161468-32-2)
- Ethyl 2-cyano-3-(dimethylamino)acrylate (CAS 16849-87-9)
- 2-(5-cyano-1-methyl-1H-pyrrol-2-yl)acetic acid (CAS 71290-65-8)
Recommended Standards
- Ethyl 4-hydroxypyrimidine-5-carboxylate (CAS 71133-20-5)
- Ethyl 5-formylfuran-2-carboxylate (CAS 22551-91-3)
- Ethyl 4-Hydroxypyrimidine-5-carboxylate (CAS 4786-52-1)
- ethyl 5-formylfuran-3-carboxylate (CAS 32365-53-0)
- (5-Amino-1H-indazol-3-yl)methanol (CAS 908247-75-6)
- 1-Iodo-3,6-dimethylimidazo[1,5-a]pyridine (CAS 1823327-00-9)
- 7-Chloro-2-isopropyl-2H-pyrazolo[4,3-d]pyrimidine (CAS 923283-07-2)
- (S)-N-(1-(3-fluorophenyl)ethyl)cyclopropanamine hydrochloride (CAS 1704977-00-3)
- (3,6-Difluoro-2-(hexyloxy)phenyl)boronic acid (CAS 343628-19-3)
- 2-ACetamido-1,3-di-o-acetyl-4,6-o-benzylidene-2-deoxy-d-glucopyranose (CAS 1423035-26-0)
- 3,5-Diiodo-4-methoxy-1-methylpyridin-2(1H)-one (CAS 920490-66-0)
- 3-Fluoro-4-methoxy-1H-indole-2-carboxylic acid (CAS 2755783-33-4)
- 3-Chlorobutyric Acid (CAS 1951-12-8)
- Fibrinopeptide A (human) (CAS 25422-31-5)
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