Methyl 5-ethyl-4-methylisoxazole-3-carboxylate CAS 160850-63-5
| CAS No. | 160850-63-5 |
| Molecular Formula | C8H11NO3 |
| Molecular Weight | 169.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Methyl 5-ethyl-4-methylisoxazole-3-carboxylate (CAS 160850-63-5), molecular formula C8H11NO3 and molecular weight 169.18 g/mol, is a CATO reference standard with documented purity and traceability.
Methyl 5-ethyl-4-methylisoxazole-3-carboxylate (C8H11NO3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
CATO manufactures Methyl 5-ethyl-4-methylisoxazole-3-carboxylate 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 | C8H11NO3 |
| Molecular Weight | 169.18 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 |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Nitrogen Atoms | 1 |
Recommended Standards
- Ethyl 4,5-dimethylisoxazole-3-carboxylate (CAS 160850-62-4)
- 1-Allyl-5-oxopyrrolidine-3-carboxylic acid (CAS 16199-99-8)
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- 2,6-Diazaspiro[3.4]octan-7-one 2,2,2-trifluoroacetate (CAS 2228784-02-7)
- 2-(2,5-Dimethyl-1h-indol-3-yl)-N-(furan-2-ylmethyl)ethan-1-amine hydrochloride (CAS 1052412-17-5)
- N-(5-(((5-(tert-Butyl)oxazol-2-yl)methyl)thio)thiazol-2-yl)-2-(4-(((1,3-dihydroxypropan-2-yl)amino)methyl)phenyl)acetamide (CAS 333389-24-5)
- FMRF Amide Related Peptide. (CAS 149471-12-5)
Why CATO?
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