3-Ethyl-1-methyl-4-nitro-1H-pyrazole-5-carboxylicacidethylester CAS 358641-22-2
| CAS No. | 358641-22-2 |
| Molecular Formula | C9H13N3O4 |
| Molecular Weight | 227.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3-Ethyl-1-methyl-4-nitro-1H-pyrazole-5-carboxylicacidethylester is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
3-Ethyl-1-methyl-4-nitro-1H-pyrazole-5-carboxylicacidethylester (CAS 358641-22-2) is a high-purity analytical reference standard with the molecular formula C9H13N3O4 and a molecular weight of 227.22 g/mol.
The molecular framework of 3-Ethyl-1-methyl-4-nitro-1H-pyrazole-5-carboxylicacidethylester (C9H13N3O4) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), 3-Ethyl-1-methyl-4-nitro-1H-pyrazole-5-carboxylicacidethylester meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H13N3O4 |
| Molecular Weight | 227.22 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |
Recommended Standards
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- 64626-33-1 1,6-Diazecine-2,7-dicarboxylic acid, decahydro-5,10-dioxo- DTXSID70467641 (CAS 64626-33-1)
- Semaglutide impurity 103 (CAS 1446013-07-5)
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