1-(4-Chlorophenyl)-3-(2-(2-(3-methyl-4-nitroisoxazol-5-yl)vinyl)thiophen-3-yl)prop-2-en-1-one CAS 256353-68-1
| CAS No. | 256353-68-1 |
| Molecular Formula | C19H13ClN2O4S |
| Molecular Weight | 400.84 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1-(4-Chlorophenyl)-3-(2-(2-(3-methyl-4-nitroisoxazol-5-yl)vinyl)thiophen-3-yl)prop-2-en-1-one.
1-(4-Chlorophenyl)-3-(2-(2-(3-methyl-4-nitroisoxazol-5-yl)vinyl)thiophen-3-yl)prop-2-en-1-one (CAS 256353-68-1) is a high-purity analytical reference standard with the molecular formula C19H13ClN2O4S and a molecular weight of 400.84 g/mol.
The molecular framework of 1-(4-Chlorophenyl)-3-(2-(2-(3-methyl-4-nitroisoxazol-5-yl)vinyl)thiophen-3-yl)prop-2-en-1-one (C19H13ClN2O4S) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
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 | C19H13ClN2O4S |
| Molecular Weight | 400.84 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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