Methyl 5-chloro-4-({[(4-methylbenzyl)oxy]imino}methyl)-1-phenyl-1H-pyrazole-3-carboxylate CAS 477709-62-9
| CAS No. | 477709-62-9 |
| Molecular Formula | C20H18ClN3O3 |
| Molecular Weight | 383.83 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Methyl 5-chloro-4-({[(4-methylbenzyl)oxy]imino}methyl)-1-phenyl-1H-pyrazole-3-carboxylate (CAS 477709-62-9), molecular formula C20H18ClN3O3 and molecular weight 383.83 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C20H18ClN3O3, Methyl 5-chloro-4-({[(4-methylbenzyl)oxy]imino}methyl)-1-phenyl-1H-pyrazole-3-carboxylate contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 383.83 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), Methyl 5-chloro-4-({[(4-methylbenzyl)oxy]imino}methyl)-1-phenyl-1H-pyrazole-3-carboxylate 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 | C20H18ClN3O3 |
| Molecular Weight | 383.83 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Methyl Standards
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- 2-[(2-Chloro-6-fluorophenyl)methyl]-4-[(1E)-[(1-phenylethyl)imino]methyl]benzene-1,3-diol (CAS 338750-15-5)
- 2-[(2-Chloro-6-fluorophenyl)methyl]-4-[(1E)-{[(4-methylphenyl)methyl]imino}methyl]benzene-1,3-diol (CAS 341967-46-2)
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Recommended Standards
- Ethyl 2-(3-(4-chlorophenyl)ureido)-4-phenyl-1H-pyrrole-3-carboxylate (CAS 250713-77-0)
- Ibrutinib Impurity 25 (CAS CATO-C4X-106425)
- Ethyl 2-(2-benzoylhydrazinyl)-5-(4-chlorophenyl)-1H-pyrrole-3-carboxylate (CAS 338419-67-3)
- Belumosudil Impurity 50 (CAS CATO-C4X-298850)
- 4-Bromo-5-methoxy-2-methylpyridazin-3(2H)-one (CAS 186792-13-2)
- Tert-butyl (2-acetamidoethyl)carbamate (CAS 207129-09-7)
- Methyl 2,3-dihydro-1H-pyrrolizine-7-carboxylate (CAS 73710-74-4)
- Cyclophosphamide impurity 31 (CAS 2517939-95-4(free base))
- N-(2-Methoxy-5-methylphenyl)thiourea (CAS 88686-29-7)
- trans-2-fluorocyclohexanamine;hydrochloride (CAS 75198-16-2)
- Sitafloxacin Impurity 19 (CAS CATO-C4X-115519)
- MOTS-c (CAS 1627580-64-6（free base）)
- 4-Amino-4-ethylcyclohexan-1-one (CAS 1262484-70-7)
- Semaglutide impurity 244(Fmoc-His(Fmoc)-Aib-OH) (CAS CATO-C4X-2226244)
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