N-(carbamoylcarbamothioyl)-3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamide CAS 303998-77-8
| CAS No. | 303998-77-8 |
| Molecular Formula | C13H10ClFN4O3S |
| Molecular Weight | 356.76 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
N-(carbamoylcarbamothioyl)-3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamide (CAS 303998-77-8) is a high-purity analytical reference standard with the molecular formula C13H10ClFN4O3S and a molecular weight of 356.76 g/mol.
N-(carbamoylcarbamothioyl)-3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamide (C13H10ClFN4O3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, 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).
As a certified reference material (CRM), N-(carbamoylcarbamothioyl)-3-(2-chloro-6-fluorophenyl)-5-methylisoxazole-4-carboxamide 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 | C13H10ClFN4O3S |
| Molecular Weight | 356.76 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related N Standards
Recommended Standards
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- Semaglutide impurity 71 (CAS CATO-C4X-222671)
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