5-(2-Methoxyphenyl)-1,2-oxazole-3-carboxylic acid CAS 668971-16-2
| CAS No. | 668971-16-2 |
| Molecular Formula | C11H9NO4 |
| Molecular Weight | 219.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-(2-Methoxyphenyl)-1,2-oxazole-3-carboxylic acid 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.
CATO supplies 5-(2-Methoxyphenyl)-1,2-oxazole-3-carboxylic acid (CAS 668971-16-2), a certified reference material (molecular formula C11H9NO4, MW 219.19 g/mol) for analytical method development and quality control.
5-(2-Methoxyphenyl)-1,2-oxazole-3-carboxylic acid (C11H9NO4) 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C11H9NO4 |
| Molecular Weight | 219.19 g/mol |
| Appearance | Pale yellow to 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 1 |
Related Methoxyphenyl Standards
- 5-(4-Methoxyphenyl)oxazole-2-carboxylic acid (CAS 1019-93-8)
- 2-(4-Methoxyphenyl)oxazole-4-carboxylic acid (CAS 1065102-54-6)
- 5-(3-Methoxyphenyl)oxazole-4-carboxylic acid (CAS 1083274-30-9)
- 3-(3-Methoxyphenyl)isoxazole-5-carboxylic acid (CAS 883546-38-1)
- 3-(4-Methoxyphenyl)isoxazole-5-carboxylic acid (CAS 618383-47-4)
- 5-(2-Methoxyphenyl)-1,2-oxazole-4-carboxylic acid (CAS 887408-15-3)
- 5-(3-Methoxyphenyl)isoxazole-3-carboxylic acid (CAS 668971-56-0)
- 5-(3-Methoxyphenyl)isoxazole-4-carboxylic acid (CAS 887408-16-4)
Recommended Standards
- 5-(2,5-Difluorophenyl)nicotinaldehyde (CAS 887973-84-4)
- 5-(2,4-Difluorophenyl)nicotinaldehyde (CAS 887973-79-7)
- 5-(2,3-Difluorophenyl)nicotinaldehyde (CAS 887973-80-0)
- 4-Oxo-2-(phenylamino)-4,5-dihydrofuran-3-carboxylic acid (CAS 58337-23-8)
- 1142204-34-9 9296AC C19H21ClN2O4 [(2-{[2-(2-Chlorophenyl)ethyl]amino}-2-oxoethyl)-(4-methoxyphenyl)amino]acetic acid (CAS 1142204-34-9)
- N-(2-Methoxy-5-methylphenyl)-2-[4-(5-methyl-1,2,4-oxadiazol-3-yl)-1,3-dioxo-1H,2H,3H,5H,6H,7H,8H,9H-pyrimido[1,6-a]azepin-2-yl]acetamide (CAS 1775340-32-3)
- Fmoc-lys(Z)-cl (CAS 103321-56-8)
- 1-Bromo-4-(3,3,3-trifluoroprop-1-en-2-yl)benzene (CAS 136476-20-5)
- 2-Methyl-N-(2-(1-methyl-1h-1,2,4-triazol-5-yl)ethyl)aniline (CAS 1247901-88-7)
- 5-Isopropyl-3,6-dimethylisoxazolo[5,4-b]pyridine-4-carboxylic acid (CAS 1352506-09-2)
- 2-(tert-Butyl)-4-cyclopropoxy-N-methylbenzamide (CAS 1243348-20-0)
- (S)-4,5,6,7-Tetrahydrobenzo[d]thiazole-2,6-diamine dihydrochloride (CAS 106092-10-8)
- Glycidyl Myristate (CAS 7460-80-2)
- Semaglutide impurity 44 (CAS CATO-C4X-222644)
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