3-Ethoxy-1,2-oxazole-5-carboxylic acid CAS 135080-29-4
| CAS No. | 135080-29-4 |
| Molecular Formula | C6H7NO4 |
| Molecular Weight | 157.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 3-Ethoxy-1,2-oxazole-5-carboxylic acid (C6H7NO4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 157.12 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
3-Ethoxy-1,2-oxazole-5-carboxylic acid (CAS 135080-29-4), molecular formula C6H7NO4 and molecular weight 157.12 g/mol, is a CATO reference standard with documented purity and traceability.
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 3-Ethoxy-1,2-oxazole-5-carboxylic acid 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 | C6H7NO4 |
| Molecular Weight | 157.12 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Nitrogen Atoms | 1 |
Related Ethoxy Standards
- 2-Ethoxy-4-oxazolecarboxylic Acid (CAS 706789-09-5)
- 5-Ethoxy-2-oxazolecarboxylic Acid (CAS 68208-10-6)
- 3-Ethoxy-4-nitro-1h-pyrazole (CAS 400878-03-7)
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Recommended Standards
- 5-(Methoxymethyl)isoxazole-4-carboxylic acid (CAS 134541-08-5)
- 4-Amino-3,5-difluorobenzaldehyde (CAS 135564-23-7)
- 2-(5-Nitrofuran-2-yl)ethan-1-ol (CAS 1340270-51-0)
- Ethyl 3-hydroxyisoxazole-5-carboxylate (CAS 13626-61-4)
- 4-Bromo-1-fluoro-2-(trichloromethoxy)benzene (CAS 1417566-73-4)
- (5-Fluoro-2-(isopentyloxy)phenyl)methanol (CAS 1096330-66-3)
- 4-(piperidin-4-yl)-4H-1,2,4-triazol-3-amine dihydrochloride (CAS 1803571-60-9)
- ditert-butyl 3-oxo-1,5-diazocane-1,5-dicarboxylate (CAS 862703-10-4)
- 4-(Difluoromethyl)-2-methyl-3-nitropyridine (CAS 1805312-10-0)
- 3,6-Dichloro-2-(difluoromethoxy)cinnamic acid (CAS 1807439-20-8)
- N-ethyl-N-(2-fluorophenyl)aminosulfonamide (CAS 1564560-44-6)
- 4-Benzylpiperazine-1-sulfonamide (CAS 178312-46-4)
- Ethyl 2-amino-4-methylpentanoate hydrochloride (CAS 23420-04-4)
- Semaglutide Sodium Salt (CAS CATO-C4X-222620)
Why CATO?
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