Ethyl 5-(4-nitrophenyl)-1h-pyrazole-4-carboxylate CAS 35487-11-7
| CAS No. | 35487-11-7 |
| Molecular Formula | C12H11N3O4 |
| Molecular Weight | 261.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 261.23 g/mol gives Ethyl 5-(4-nitrophenyl)-1h-pyrazole-4-carboxylate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Ethyl 5-(4-nitrophenyl)-1h-pyrazole-4-carboxylate (CAS 35487-11-7), molecular formula C12H11N3O4 and molecular weight 261.23 g/mol, is a CATO reference standard with documented purity and traceability.
Ethyl 5-(4-nitrophenyl)-1h-pyrazole-4-carboxylate (C12H11N3O4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C12H11N3O4 |
| Molecular Weight | 261.23 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
| Nitrogen Atoms | 3 |
Related Ethyl Standards
- Ethyl 5-(3-nitrophenyl)-1H-pyrazole-3-carboxylate (CAS 1025724-57-5)
- 5-Ethyl-1-(4-nitrophenyl)-1h-pyrazole-4-carboxylic acid (CAS 1152882-20-6)
- 2-(3-Nitrophenyl)tetrahydro-1H-pyrrolo[1,2-c]imidazole-1,3(2H)-dione (CAS 1189765-13-6)
- Ethyl 1-(2-nitrophenyl)-1H-pyrazole-3-carboxylate (CAS 1258657-50-9)
- Ethyl 1-(4-nitrophenyl)-1h-pyrazole-3-carboxylate (CAS 19532-38-8)
- Ethyl 1-(4-nitrophenyl)-1H-pyrazole-4-carboxylate (CAS 91397-55-6)
- Ethyl 3-(3-nitrophenyl)-1H-pyrazole-4-carboxylate (CAS 448187-55-1)
- Ethyl 5-(4-nitrophenyl)-1H-pyrazole-3-carboxylate (CAS 854700-38-2)
Recommended Standards
- H-Gly-Ala-Asp-OH (CAS 69959-37-1)
- Ethyl 4-nitro-1-phenyl-1H-pyrazole-3-carboxylate (CAS 21443-84-5)
- H-Gly-Glu-Gly-OH (H-8770.0250) (CAS 50997-16-5)
- Ethyl 4-(1h-imidazol-1-yl)-3-nitrobenzoate (CAS 736146-14-8)
- 5-(4-Bromophenyl)-4,6-dichloropyrimidine (CAS 146533-41-7)
- Methyl 2-(4-aminophenyl)acetate (CAS 39552-81-3)
- (S)-5-fluoro-2-methyl-4-(pyrrolidin-2-yl)aniline (CAS 1213923-42-2)
- (2R)-3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-(4-methoxyphenyl)propanoic acid 1280787-09-8 GS-0850 (CAS 1280787-09-8)
- 1-(3,5-Dimethyladamantan-1-yl)ethan-1-amine hydrochloride (CAS 352444-60-1)
- 8-Cyclopropylimidazo[1,2-a]pyridine-3-carboxylic acid (CAS 1019022-65-1)
- 1-((3AR,6aS)-3-methylenetetrahydro-2H-furo[2,3-b]pyrrol-6(6aH)-yl)ethanone (CAS 257940-60-6)
- 5-Bromo-6-methyl-2-oxo-1,2-dihydropyridine-4-carboxylic acid (CAS 1368143-89-8)
- 1-(Difluoromethyl)-2-((difluoromethyl)thio)-1H-benzo[d]imidazole (CAS 329269-59-2)
- [D-Phe22]Semaglutide (CAS CATO-C4X-2226222)
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