Methyl 5-chloro-4-({[(4-fluorobenzyl)oxy]imino}methyl)-1-phenyl-1H-pyrazole-3-carboxylate CAS 320423-33-4
| CAS No. | 320423-33-4 |
| Molecular Formula | C19H15ClFN3O3 |
| Molecular Weight | 387.79 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 Methyl 5-chloro-4-({[(4-fluorobenzyl)oxy]imino}methyl)-1-phenyl-1H-pyrazole-3-carboxylate.
Methyl 5-chloro-4-({[(4-fluorobenzyl)oxy]imino}methyl)-1-phenyl-1H-pyrazole-3-carboxylate (CAS 320423-33-4), molecular formula C19H15ClFN3O3 and molecular weight 387.79 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C19H15ClFN3O3, Methyl 5-chloro-4-({[(4-fluorobenzyl)oxy]imino}methyl)-1-phenyl-1H-pyrazole-3-carboxylate contains a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 387.79 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C19H15ClFN3O3 |
| Molecular Weight | 387.79 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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 | F/Cl-containing |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- Methyl 5-chloro-4-({[(3-fluorobenzyl)oxy]imino}methyl)-1-phenyl-1H-pyrazole-3-carboxylate (CAS 477709-61-8)
- 3-((3-Chloro-5-(trifluoromethyl)pyridin-2-yl)amino)-N-(3-methoxybenzyl)propanamide (CAS 1376308-87-0)
- 2-(3-Chloro-5-(trifluoromethyl)pyridin-2-yl)-2-morpholino-2-(thiophen-2-yl)acetonitrile (CAS 338762-06-4)
- 2-Chloro-4-nitrobenzyl 3-(3-hydroxyquinoxalin-2-yl)propanoate (CAS 831249-87-7)
- 4-(3-(2-Chloro-4-nitrobenzyl)ureido)benzene-1-sulfonyl fluoride (CAS 21322-84-9)
- 5-{[5-chloro-2-(methoxycarbonyl)phenyl]sulfamoyl}-2-fluorobenzoic acid (CAS 949760-08-1)
- 5-Chloro-1-(4-nitrobenzyl)-3-phenyl-1H-indole-2-carbonitrile (CAS 339098-49-6)
- Benzyl 7'-chloro-2'-oxo-1',2'-dihydrospiro[piperidine-4,4'-pyrido[2,3-d][1,3]oxazine]-1-carboxylate (CAS 883984-95-0)
Recommended Standards
- Pantoprazole Impurity 32 (CAS CATO-C4X-139932)
- 2-(6-Chloropyridin-3-yl)-1-(3-(trifluoromethyl)benzyl)-1H-benzo[d]imidazole (CAS 337920-54-4)
- (S)-Methyl 3-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-4-chloro-4-oxobutanoate (CAS 596095-91-9)
- 2-(2-Chloropyridin-3-yl)-1-(4-(trifluoromethyl)benzyl)-1H-benzo[d]imidazole (CAS 338411-56-6)
- Ethyl 6-((3-chlorobenzyl)amino)-5-cyano-2-phenylnicotinate (CAS 477866-15-2)
- 6-amino-5-methylpyridin-3-ylboronic acid (CAS 1032759-01-5)
- 2-(3-Chloro-2-methylphenoxy)acetic acid (CAS 579-64-6)
- 3-Ethyl-4-(2-methylpent-2-enoyl)piperazin-2-one (CAS 1344816-94-9)
- 4-Ethyl-n-(propan-2-yl)aniline (CAS 103093-97-6)
- N-(2-((2-Methoxy-5-methylphenyl)amino)-2-oxoethyl)-6-oxo-1,6-dihydropyridine-3-carboxamide (CAS 1147281-32-0)
- Ethyl 3-methoxy-4-nitrobenzoate (CAS 10259-23-1)
- Methyl 4-amino-1H-pyrrolo[2,3-b]pyridine-3-carboxylate (CAS 1638763-92-4)
- 2-(3-Ethoxyphenyl)morpholine (CAS 1017480-71-5)
- Semaglutide impurity 95 (CAS CATO-C4X-222695)
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