(E)-4-((4-carbamoylphenyl)amino)-4-oxobut-2-enoic acid CAS 123558-03-2
| CAS No. | 123558-03-2 |
| Molecular Formula | C11H10N2O4 |
| Molecular Weight | 234.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(E)-4-((4-carbamoylphenyl)amino)-4-oxobut-2-enoic acid (C11H10N2O4) 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).
(E)-4-((4-carbamoylphenyl)amino)-4-oxobut-2-enoic acid (CAS 123558-03-2) is a high-purity analytical reference standard with the molecular formula C11H10N2O4 and a molecular weight of 234.21 g/mol.
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.
Physical & Chemical Properties
| Molecular Formula | C11H10N2O4 |
| Molecular Weight | 234.21 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1992 |
| Nitrogen Atoms | 2 |
Related E Standards
- 4-((2-Carbamoylphenyl)amino)-4-oxobutanoic acid (CAS 306325-56-4)
- 4-((3-Carbamoylphenyl)amino)-4-oxobutanoic acid (CAS 74182-38-0)
- 4-((4-Carbamoylphenyl)amino)-4-oxobutanoic acid (CAS 303214-83-7)
- n-(2-Carbamoylphenyl)furan-2-carboxamide (CAS 59490-97-0)
- N-(2-Carbamoylphenyl)-1H-pyrrole-2-carboxamide (CAS 89812-80-6)
- n-(2-Carbamoylphenyl)benzamide (CAS 18543-22-1)
- 5-(3-Carbamoylphenyl)picolinic acid (CAS 1261912-75-7)
- N-(4-Carbamoylphenyl)-3-methylisoxazole-5-carboxamide (CAS 62536-30-5)
Recommended Standards
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- 2,5-Dibromo-3-(hydroxymethyl)pyridine (CAS 1227490-32-5)
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- 2-(2-Cyano-3-fluorophenyl)-6-fluorobenzonitrile (CAS 1400644-44-1)
- 2-Cyclopropoxy-4-methylaniline (CAS 1243448-38-5)
- Potassium (Z)-2-bromo-3-methylbut-1-enyltrifluoroborate (CAS 1692895-44-5)
- Methyl 2-Chloro-4-cyanobenzoate (CAS 98592-34-8)
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