1-Ethyl-3-nitro-1H-pyrazole-4-carboxamide CAS 61716-99-2
| CAS No. | 61716-99-2 |
| Molecular Formula | C6H8N4O3 |
| Molecular Weight | 184.15 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 1-Ethyl-3-nitro-1H-pyrazole-4-carboxamide.
1-Ethyl-3-nitro-1H-pyrazole-4-carboxamide (CAS 61716-99-2), molecular formula C6H8N4O3 and molecular weight 184.15 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 1-Ethyl-3-nitro-1H-pyrazole-4-carboxamide is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 184.15 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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 | C6H8N4O3 |
| Molecular Weight | 184.15 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, water |
| 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.) | 1974 |
| Nitrogen Atoms | 4 |
Related Ethyl Standards
- 1-Ethyl-4-nitro-1h-pyrazole-3-carboxamide (CAS 1174906-82-1)
- 2-(3-Methyl-4-nitro-1H-pyrazol-1-yl)acetamide (CAS 1177320-89-6)
- 2-(2-Methyl-4-nitro-1H-imidazol-1-yl)acetamide (CAS 120799-99-7)
- 2-(5-Methyl-4-nitro-1H-pyrazol-1-yl)acetamide (CAS 1245771-67-8)
- 1-Ethyl-4-nitro-1H-pyrazole-5-carboxamide (CAS 1384856-20-5)
- 1-(5-Nitro-2-pyridinyl)-1,2-ethanediol (CAS 1419604-66-2)
- (S)-2-Nitro-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazin-6-amine (CAS 187235-66-1)
- 1-methyl-4-nitro-1H-pyrrole-2-carbohydrazide (CAS 28494-50-0)
Recommended Standards
- 1-Ethyl-1H-pyrazole-3,4-dicarboxylic acid (CAS 52942-75-3)
- 1-Ethyl-1H-imidazole-4,5-dicarboxylic acid (CAS 86263-61-8)
- 1-Oxo-1,3-dihydroisobenzofuran-5,6-dicarbonitrile (CAS 65975-31-7)
- 1,3-Dimethyl-4-nitro-1H-pyrazole-5-carboxamide (CAS 78208-58-9)
- 3-[(S)-{[(tert-butoxy)carbonyl]amino}(carboxy)methyl]bicyclo[1.1.1]pentane-1-carboxylic acid (CAS 1986905-51-4)
- (Tetrahydro-2h-pyran-4-yl)(o-tolyl)methanamine (CAS 1343470-62-1)
- Ethyl 4-oxo-3,4-dihydro-2H-pyran-2-carboxylate (CAS 287193-06-0)
- 4-(3-Methyloxetan-3-yl)benzonitrile (CAS 1225380-13-1)
- 3-(3-Chlorophenyl)-1,2,4-oxadiazole-5-carboxylic acid (CAS 944896-63-3)
- 2-Chloro-N-(1,1-dioxo-1λ6-thiolan-3-yl)-N-(thiophen-2-ylmethyl)acetamide (CAS 852940-43-3)
- Ethyl 4-(5-formylfuran-2-yl)benzoate (CAS 19247-87-1)
- 1-Methyl-4-phenyl-1,2,3,4-tetrahydrocinnoline (CAS 51718-17-3)
- 5-Fluoro-1,3-dimethoxy-2-nitrobenzene (CAS 1806452-66-3)
- 30003-72-6 insulin chain b oxidized (CAS 30003-72-6)
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