1-(2,5-Dichlorophenyl)-3-(ethoxycarbonyl)-4,5-dihydro-1h-pyrazole-5-carboxylic acid CAS 1264041-98-6
| CAS No. | 1264041-98-6 |
| Molecular Formula | C13H12Cl2N2O4 |
| Molecular Weight | 331.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1-(2,5-Dichlorophenyl)-3-(ethoxycarbonyl)-4,5-dihydro-1h-pyrazole-5-carboxylic acid (CAS 1264041-98-6), molecular formula C13H12Cl2N2O4 and molecular weight 331.15 g/mol, is a CATO reference standard with documented purity and traceability.
1-(2,5-Dichlorophenyl)-3-(ethoxycarbonyl)-4,5-dihydro-1h-pyrazole-5-carboxylic acid (C13H12Cl2N2O4) contains a nitrogen-containing heterocyclic scaffold, 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C13H12Cl2N2O4 |
| Molecular Weight | 331.15 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichlorophenyl Standards
- 1-(3,4-Dichlorophenyl)-3-(ethoxycarbonyl)-4,5-dihydro-1h-pyrazole-5-carboxylic acid (CAS 1264041-20-4)
- 3-[1-(2,4-Dichlorophenyl)-2-(1H-imidazol-1-yl)ethoxy]-1,2-propanediol (CAS 86491-83-0)
- Methyl 3-[4-(3,4-dichlorophenyl)piperazino]-3-oxopropanoate (CAS 303151-72-6)
- (E)-3-(2,6-dichlorophenyl)-1-(2-methylimidazo[1,2-a]pyridin-3-yl)prop-2-en-1-one (CAS 1357155-82-8)
- 1-((5-(3,4-Dichlorophenyl)furan-2-yl)methylene)-2-phenylhydrazine (CAS 374090-33-2)
- 3-(2,4-Dichlorophenyl)-1-(p-tolyl)-1H-pyrazole-4-carbaldehyde (CAS 618098-96-7)
- 4-((3,5-Dichlorophenyl)diazenyl)-5-(p-tolyl)-1H-pyrazole (CAS 338413-97-1)
- Ethyl 2-(2-((3,5-dichlorophenyl)amino)thiazol-4-yl)acetate (CAS 1493430-96-8)
Recommended Standards
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- 5-Cyclopropoxy-2-iodo-N,N-dimethylbenzamide (CAS 1243464-17-6)
- 4-Nitrobenzene-1,3-diamine sulfate (CAS 200295-57-4)
- 5-Bromo-3-nitro-1H-pyrrolo[2,3-b]pyridine (CAS 507462-26-2)
- 4-Fluoro-2-methoxy-N-methylbenzamide (CAS 36695-94-0)
- 4-Amino-3-isopropyl-5-methylbenzaldehyde (CAS 2387444-34-8)
- 4-Methoxybenzyl Acetate (CAS 104-21-2)
- 4-Hydroxy-2-morpholinopyrimidine-5-carboxylic acid (CAS 1023812-03-4)
- Methyl 3-oxo-4-(p-tolyl)butanoate (CAS 78861-25-3)
- Dexmedetomidine Impurity 86 (CAS CATO-C4X-123086)
- (S)-4-(pyrrolidin-2-yl)-3-(trifluoromethyl)phenol (CAS 1335825-93-8)
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