(4Z)-3-tert-Butyl-4-({2-[(4-chlorophenyl)sulfanyl]-5-nitrophenyl}methylidene)-1-phenyl-4,5-dihydro-1H-pyrazol-5-one CAS 1024741-19-2
| CAS No. | 1024741-19-2 |
| Molecular Formula | C26H22ClN3O3S |
| Molecular Weight | 491.99 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(4Z)-3-tert-Butyl-4-({2-[(4-chlorophenyl)sulfanyl]-5-nitrophenyl}methylidene)-1-phenyl-4,5-dihydro-1H-pyrazol-5-one (CAS 1024741-19-2) is a high-purity analytical reference standard with the molecular formula C26H22ClN3O3S and a molecular weight of 491.99 g/mol.
(4Z)-3-tert-Butyl-4-({2-[(4-chlorophenyl)sulfanyl]-5-nitrophenyl}methylidene)-1-phenyl-4,5-dihydro-1H-pyrazol-5-one (C26H22ClN3O3S) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, 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).
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.
As a certified reference material (CRM), (4Z)-3-tert-Butyl-4-({2-[(4-chlorophenyl)sulfanyl]-5-nitrophenyl}methylidene)-1-phenyl-4,5-dihydro-1H-pyrazol-5-one 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 | C26H22ClN3O3S |
| Molecular Weight | 491.99 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) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1988 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
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