5-(Furan-2-yl)oxazole-4-carboxylic acid CAS 143659-16-9
| CAS No. | 143659-16-9 |
| Molecular Formula | C8H5NO4 |
| Molecular Weight | 179.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-(Furan-2-yl)oxazole-4-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.
5-(Furan-2-yl)oxazole-4-carboxylic acid (CAS 143659-16-9) is a high-purity analytical reference standard with the molecular formula C8H5NO4 and a molecular weight of 179.13 g/mol.
5-(Furan-2-yl)oxazole-4-carboxylic acid (C8H5NO4) 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 | C8H5NO4 |
| Molecular Weight | 179.13 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
| Nitrogen Atoms | 1 |
Related Furan Standards
- 5-(Furan-2-yl)oxazole-2-carboxylic acid (CAS 1352496-53-7)
- 5-(Furan-2-yl)-1,2-oxazole-4-carboxylic acid (CAS 1423032-14-7)
- 5-(furan-3-yl)-1,2-oxazole-4-carboxylic acid (CAS 1540898-58-5)
- 3-(Furan-2-yl)isoxazole-5-carboxylic acid (CAS 901927-31-9)
- 5-(Furan-3-yl)oxazole-4-carboxylic acid (CAS 88352-89-0)
- (Furan-2-ylmethyl)(2,2,2-trifluoroethyl)amine (CAS 852840-61-0)
- {[5-(furan-2-yl)-1,3,4-oxadiazol-2-yl]methyl}(methyl)amine (CAS 1247425-24-6)
- 2-(3-(Furan-3-yl)-1,2,4-oxadiazol-5-yl)ethan-1-amine (CAS 1341917-69-8)
Recommended Standards
- Pyrido[2,3-b]pyrazine-2,3,6-triol (CAS 144435-08-5)
- 2-Oxo-2,3-dihydro-1,3-benzoxazole-7-carboxylic acid (CAS 141940-33-2)
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- 5-(Isoxazol-5-yl)furan-2-carboxylic acid (CAS 1399654-32-0)
- 3,3',5,5'-Tetrachloro-2,2'-bipyridine (CAS 100846-28-4)
- 3-(4-Amino-1h-pyrazol-1-yl)propan-1-ol (CAS 1249733-51-4)
- 3-[(3,4-dichlorophenyl)methoxy]benzaldehyde (CAS 588715-60-0)
- Methyl furo[2,3-b]pyridine-2-carboxylate (CAS 1027511-36-9)
- 4-(2-Bromoacetyl)-N,N-dimethylbenzene-1-sulfonamide (CAS 89102-54-5)
- 3-(Benzyloxy)-6-iodo-2-methylpyridine (CAS 856165-76-9)
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