Ethyl 5-amino-1-(2,4-dichlorobenzoyl)-1H-pyrazole-4-carboxylate CAS 124281-80-7
| CAS No. | 124281-80-7 |
| Molecular Formula | C13H11Cl2N3O3 |
| Molecular Weight | 328.15 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 Ethyl 5-amino-1-(2,4-dichlorobenzoyl)-1H-pyrazole-4-carboxylate.
Ethyl 5-amino-1-(2,4-dichlorobenzoyl)-1H-pyrazole-4-carboxylate (CAS 124281-80-7) is a high-purity analytical reference standard with the molecular formula C13H11Cl2N3O3 and a molecular weight of 328.15 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, Ethyl 5-amino-1-(2,4-dichlorobenzoyl)-1H-pyrazole-4-carboxylate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 328.15 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C13H11Cl2N3O3 |
| Molecular Weight | 328.15 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1992 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Ethyl Standards
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Recommended Standards
- 2-((Bromodifluoromethyl)sulfonyl)benzo[d]thiazole (CAS 1230154-56-9)
- Axitinib Impurity N25 (CAS 1266386-30-4)
- 4-Bromo-2-(((3,5-difluorobenzyl)amino)methyl)phenol (CAS 1223889-75-5)
- 5-Bromo-N-cyclopropyl-N-(2,2,2-trifluoroethyl)thiophene-2-carboxamide (CAS 1270942-04-5)
- 1-Vinyl-1H-pyrrole-2-carboxylic acid 1-vinyl-1 h-pyrrole-2-carboxylic acid 34600-55-0 (CAS 34600-55-0)
- 2,5-Dioxo-1-((3-((3-oxo-3-(2-(5-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamido)ethoxy)propyl)disulfanyl)propanoyl)oxy)pyrrolidine-3-sulfonic acid (CAS 858128-64-0)
- Cyclo(-Gly-Phe) (CAS 10125-07-2)
- Ethyl 1-(4-fluorophenyl)-3,5-dimethyl-1H-pyrazole-4-carboxylate (CAS 477710-46-6)
- 1,3-Dibromo-2-ethoxy-5-methylbenzene (CAS 1266253-70-6)
- 5-Hydroxy-2-(trifluoromethyl)benzonitrile (CAS 731002-49-6)
- N-Methoxy-N-methylfuran-3-carboxamide (CAS 148900-66-7)
- 3-(2,5-Dichloropyrimidin-4-yl)-1-(phenylsulfonyl)-1H-indole (CAS 882562-40-5)
- Tert-butyl 6-cyano-1H-indole-1-carboxylate (CAS 889676-34-0)
- D-Phe6-Tirzepatide (CAS CATO-CPTD788925)
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