Ammonium 5-(Carbamoyl)isoxazol-3-olate CAS 81965-22-2
| CAS No. | 81965-22-2 |
| Molecular Formula | C4H4N2O3 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 145.12 g/mol gives Ammonium 5-(Carbamoyl)isoxazol-3-olate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Ammonium 5-(Carbamoyl)isoxazol-3-olate (CAS 81965-22-2) is a high-purity analytical reference standard with the molecular formula C4H4N2O3H3N and a molecular weight of 145.12 g/mol.
Ammonium 5-(Carbamoyl)isoxazol-3-olate (C4H4N2O3H3N) 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 presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), Ammonium 5-(Carbamoyl)isoxazol-3-olate 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 | C4H4N2O3 H3N |
| Molecular Weight | 145.12 g/mol |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1980 |
| Nitrogen Atoms | 3 |
Related Ammonium Standards
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- 3-Amino-1-(2-ethylpiperidin-1-yl)propan-1-one (CAS 1094799-31-1)
- 2-(Aminomethyl)-3-(difluoromethyl)-4-fluoropyridine-6-acetic acid (CAS 1805532-19-7)
- 3-Chloro-4-(trifluoromethyl)benzoyl chloride (CAS 1092460-77-9)
- Insulin Degludec Impurity 12 (CAS CATO-C4X-215712)
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