Ethyl 5-amino-1-(4-chlorophenyl)-3-(2-hydroxyethoxy)-1H-pyrazole-4-carboxylate CAS 321391-78-0
| CAS No. | 321391-78-0 |
| Molecular Formula | C14H16ClN3O4 |
| Molecular Weight | 325.75 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-(4-chlorophenyl)-3-(2-hydroxyethoxy)-1H-pyrazole-4-carboxylate.
Ethyl 5-amino-1-(4-chlorophenyl)-3-(2-hydroxyethoxy)-1H-pyrazole-4-carboxylate (CAS 321391-78-0), molecular formula C14H16ClN3O4 and molecular weight 325.75 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, Ethyl 5-amino-1-(4-chlorophenyl)-3-(2-hydroxyethoxy)-1H-pyrazole-4-carboxylate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 325.75 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 | C14H16ClN3O4 |
| Molecular Weight | 325.75 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Ethyl Standards
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Recommended Standards
- 6-((4-Chlorophenyl)amino)-[2,3'-bipyridine]-5-carboxylic acid (CAS 71204-01-8)
- LAU159 (CAS 2055050-87-6)
- 6-((3-Chlorophenyl)amino)-[2,3'-bipyridine]-5-carboxylic acid (CAS 71204-02-9)
- N-((6-Chloro-3-phenylpyridazin-4-yl)oxy)benzamide (CAS 92688-21-6)
- 8-Bromo-1H-benzo[d][1,3]oxazin-2(4H)-one (CAS 1537154-77-0)
- O-Benzoyl-N-phenylhydroxylamine (CAS 82461-60-7)
- 16499-54-0 2-Amino-5-(trifluoromethyl)benzamide C8H7F3N2O V3661 (CAS 16499-54-0)
- 2-(3,4-Dimethoxyphenyl)-N-(pyridin-3-ylmethyl)ethan-1-amine (CAS 356093-05-5)
- 1-Allyl-5-(allylamino)-3-bromo-1H-pyrazole-4-carbonitrile (CAS 2380030-21-5)
- 7-Quinazolinamine (CAS 101421-73-2)
- tert-Butyl O-benzyl-L-serinate hydrochloride (CAS 93760-41-9)
- Methyl spiro[2.3]Hexane-4-carboxylate (CAS 2122560-72-7)
- Benzyl piperidine-3-carboxylate (CAS 97231-90-8)
- Staphylococcus Aureus Protein A (SpA)-Derived Peptide (H-2228.0005) (CAS 144979-26-0)
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