(2E)-4-[(3-Chlorophenyl)amino]-4-oxobut-2-enoic acid CAS 18196-80-0
| CAS No. | 18196-80-0 |
| Molecular Formula | C10H8ClNO3 |
| Molecular Weight | 225.63 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.
(2E)-4-[(3-Chlorophenyl)amino]-4-oxobut-2-enoic acid (CAS 18196-80-0), molecular formula C10H8ClNO3 and molecular weight 225.63 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of (2E)-4-[(3-Chlorophenyl)amino]-4-oxobut-2-enoic acid (C10H8ClNO3) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a certified reference material (CRM), (2E)-4-[(3-Chlorophenyl)amino]-4-oxobut-2-enoic 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 | C10H8ClNO3 |
| Molecular Weight | 225.63 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related E Standards
- 5-(4-Chlorophenyl)-4,5-dihydroisoxazole-3-carboxylic acid (CAS 1018051-43-8)
- 5-(3-Chlorophenyl)-4,5-dihydro-1,2-oxazole-3-carboxylic acid (CAS 1018052-82-8)
- 3-(3-Chlorophenyl)-4,5-dihydro-1,2-oxazole-5-carboxylic acid (CAS 1038696-53-5)
- (2E)-4-[(2-Chlorophenyl)amino]-4-oxobut-2-enoic acid (CAS 106691-35-4)
- 3-(4-Chlorophenyl)-4,5-dihydro-1,2-oxazole-5-carboxylic acid (CAS 109888-59-7)
- (E)-4-((4-Chlorophenyl)amino)-4-oxobut-2-enoic acid (CAS 114328-56-2)
- (2E)-4-[(3-chlorophenyl)amino]-4-oxobut-2-enoic acid (CAS 36847-88-8)
- (2E)-4-[(4-chlorophenyl)amino]-4-oxobut-2-enoic acid (CAS 306935-74-0)
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