6-Methoxy-benzo[d]isoxazole-3-carboxylic acid ethyl ester CAS 57764-51-9
| CAS No. | 57764-51-9 |
| Molecular Formula | C11H11NO4 |
| Molecular Weight | 221.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 6-Methoxy-benzo[d]isoxazole-3-carboxylic acid ethyl ester.
6-Methoxy-benzo[d]isoxazole-3-carboxylic acid ethyl ester (CAS 57764-51-9) is a high-purity analytical reference standard with the molecular formula C11H11NO4 and a molecular weight of 221.21 g/mol.
Based on its molecular formula C11H11NO4, 6-Methoxy-benzo[d]isoxazole-3-carboxylic acid ethyl ester 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 221.21 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 6-Methoxy-benzo[d]isoxazole-3-carboxylic acid ethyl ester under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C11H11NO4 |
| Molecular Weight | 221.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Nitrogen Atoms | 1 |
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Recommended Standards
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- 2-Methylbenzofuran-5,7-diamine (CAS 705928-16-1)
- (R)-2-(3,4-difluorophenyl)pyrrolidine (CAS 1241677-04-2)
- 4-(1-(2-(Dimethylamino)ethyl)-1h-pyrazol-4-yl)benzoic acid (CAS 1206970-25-3)
- 3-Bromo-1-(o-tolyl)-1H-pyrrole-2,5-dione (CAS 1256627-82-3)
- 2-Bromo-5-(p-tolyl)-5,6-dihydrobenzo[d]thiazol-7(4H)-one (CAS 1387563-24-7)
- Suvorexant Impurity 21 (CAS CATO-C4X-181221)
- 1-Acetyl-2,2,5,5-tetramethyl-3-pyrroline-3-carboxylic acid N-hydroxysuccinimide ester (CAS 1076198-74-7)
- Iguratimod Impurity 30 (CAS CATO-C4X-182630)
- 2-(4-Bromophenoxy)propanoic acid (CAS 32019-08-2)
- Semaglutide impurity 84 (CAS CATO-C4X-222684)
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