5-(1-methyl-1H-pyrazol-4-yl)-1,2-oxazole-4-carboxylic acid CAS 1487669-94-2
| CAS No. | 1487669-94-2 |
| Molecular Formula | C8H7N3O3 |
| Molecular Weight | 193.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-(1-methyl-1H-pyrazol-4-yl)-1,2-oxazole-4-carboxylic acid (CAS 1487669-94-2) is a high-purity analytical reference standard with the molecular formula C8H7N3O3 and a molecular weight of 193.16 g/mol.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 5-(1-methyl-1H-pyrazol-4-yl)-1,2-oxazole-4-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 193.16 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
As a certified reference material (CRM), 5-(1-methyl-1H-pyrazol-4-yl)-1,2-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.
Physical & Chemical Properties
| Molecular Formula | C8H7N3O3 |
| Molecular Weight | 193.16 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.) | 1992 |
| Nitrogen Atoms | 3 |
Recommended Standards
- MDBN (CAS 1485-00-3)
- 2-(Hydroxymethyl)benzo[d]oxazole-4-carboxylic acid (CAS 1508092-67-8)
- 8-Methoxypyrido[3,4-d]pyrimidine-2,4-diol (CAS 1470249-15-0)
- 4-Nitrobenzoxazole-2-methanamine (CAS 1510253-71-0)
- 5-Aminopentane-1-thiol (CAS 58657-85-5)
- 3-Bromo-4-(trifluoromethyl)-1H-pyrazole (CAS 1936710-01-8)
- N3PT (CAS 13860-66-7)
- Resmetirom impurity 90 (CAS CATO-C4X-291290)
- 8-(3-Iodophenyl)-8-oxooctanenitrile (CAS 898767-99-2)
- 1-(5-(Aminomethyl)benzo[d]oxazol-2-yl)ethanone (CAS 1803814-96-1)
- 2-Pyridinecarboxamide, n-[2-(methylthio)phenyl]- (CAS 794582-15-3)
- Meropenem Impurity 45 (CAS CATO-C4X-130945)
- 2,6-Diisopropyl-4-((4-(4-methoxyphenyl)piperazin-1-yl)methyl)phenol (CAS 860649-21-4)
- Tirzepatide Impurity 58 (CAS CATO-C4X-324058)
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