| CAS No. | 70671-32-8 |
| Molecular Formula | C6H10N2O2 |
| Molecular Weight | 142.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 142.16 g/mol gives (4S,5R)-5-Ethyl-4,5-dihydrooxazole-4-carboxamide distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
(4S,5R)-5-Ethyl-4,5-dihydrooxazole-4-carboxamide (CAS 70671-32-8), molecular formula C6H10N2O2 and molecular weight 142.16 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, (4S,5R)-5-Ethyl-4,5-dihydrooxazole-4-carboxamide is typically white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 142.16 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
| Molecular Formula | C6H10N2O2 |
| Molecular Weight | 142.16 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1977 |
| Nitrogen Atoms | 2 |