(4Z)-4-{[(4-chlorophenyl)amino]methylidene}-3-ethoxy-1-phenyl-4,5-dihydro-1H-pyrazol-5-one CAS 338750-93-9
| CAS No. | 338750-93-9 |
| Molecular Formula | C18H16ClN3O2 |
| Molecular Weight | 341.79 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 341.79 g/mol gives (4Z)-4-{[(4-chlorophenyl)amino]methylidene}-3-ethoxy-1-phenyl-4,5-dihydro-1H-pyrazol-5-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies (4Z)-4-{[(4-chlorophenyl)amino]methylidene}-3-ethoxy-1-phenyl-4,5-dihydro-1H-pyrazol-5-one (CAS 338750-93-9), a certified reference material (molecular formula C18H16ClN3O2, MW 341.79 g/mol) for analytical method development and quality control.
(4Z)-4-{[(4-chlorophenyl)amino]methylidene}-3-ethoxy-1-phenyl-4,5-dihydro-1H-pyrazol-5-one (C18H16ClN3O2) contains a steroid core, an amide 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.
CATO manufactures (4Z)-4-{[(4-chlorophenyl)amino]methylidene}-3-ethoxy-1-phenyl-4,5-dihydro-1H-pyrazol-5-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C18H16ClN3O2 |
| Molecular Weight | 341.79 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
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Recommended Standards
- (2S,4S)-1-(tert-butoxycarbonyl)-4-(4-chlorophenoxy)pyrrolidine-2-carboxylic acid (CAS 686766-53-0)
- (5-Chloro-1-methyl-3-phenyl-1H-pyrazol-4-yl)methyl phenylcarbamate (CAS 318248-39-4)
- (2S,4S)-1-(tert-butoxycarbonyl)-4-(3-chlorophenoxy)pyrrolidine-2-carboxylic acid (CAS 686766-56-3)
- (E)-(1-{2,7-dimethylimidazo[1,2-a]pyridin-3-yl}ethylidene)amino 4-chlorobenzoate (CAS 478047-82-4)
- Methyl 4-(3-acetylphenyl)-2-fluorobenzoate (CAS 1820606-92-5)
- 4-((4-Chlorophenyl)thio)-2,3-dihydrothiophene 1,1-dioxide (CAS 339023-41-5)
- 4-Hydroxy-5-nitropyrimidine (CAS 219543-69-8)
- 2-(6-Amino-2-oxobenzo[d]oxazol-3(2H)-yl)-N,N-dimethylacetamide (CAS 883545-23-1)
- Methyl 3-formylpyrazolo[1,5-a]pyridine-5-carboxylate (CAS 1101120-09-5)
- Mitoxantrone EP Impurity A (CAS 89991-52-6)
- 1-(1-Ethyl-2-mercapto-1h-benzo[d]imidazol-5-yl)butan-1-one (CAS 790270-89-2)
- 2-Amino-N-cyclopentylacetamide (CAS 885280-56-8)
- Ozanimod Impurity 27 (CAS CATO-C4X-290227)
- Hexapeptide-1 (CAS CATO-CPTD788821)
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