2-(4-Nitro-1h-pyrazol-1-yl)aniline CAS 62537-74-0
| CAS No. | 62537-74-0 |
| Molecular Formula | C9H8N4O2 |
| Molecular Weight | 204.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
2-(4-Nitro-1h-pyrazol-1-yl)aniline (CAS 62537-74-0), molecular formula C9H8N4O2 and molecular weight 204.19 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H8N4O2, 2-(4-Nitro-1h-pyrazol-1-yl)aniline contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 204.19 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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 | C9H8N4O2 |
| Molecular Weight | 204.19 g/mol |
| Appearance | Pale yellow to 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 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1974 |
| Nitrogen Atoms | 4 |
Related Nitro Standards
- 5-(2-Nitro-phenyl)-2h-pyrazol-3-ylamine (CAS 1107523-90-9)
- 1-Benzyl-3-nitro-1H-1,2,4-triazole (CAS 136118-54-2)
- 2-Nitro-5-(1H-pyrazol-1-yl)aniline (CAS 934992-78-6)
- 3-(4-Methyl-3-nitro-phenyl)-1H-[1,2,4]triazole (CAS 845884-77-7)
- 3-(4-Nitro-1H-pyrazol-1-yl)aniline (CAS 62537-75-1)
- 4-(5-Nitro-1H-imidazol-4-yl)aniline (CAS 72798-75-5)
- 4-Nitro-1-phenyl-1H-pyrazol-3-amine (CAS 701917-04-6)
- 5-Nitro-2-(1H-pyrrol-1-yl)phenol (CAS 106981-64-0)
Recommended Standards
- 2-(4-Methylphenyl)-2H-1,2,3,4-tetrazole-5-carboxylic acid (CAS 65251-30-1)
- 2-(5-Methyl-1H-tetrazol-1-yl)benzoic acid (CAS 72470-51-0)
- 2-(4-Methyl-1H-pyrazol-1-yl)-3-nitropyridine (CAS 890716-28-6)
- 2-(5-Phenyl-1h-1,2,3,4-tetrazol-1-yl)acetic acid (CAS 21743-58-8)
- (4-Propyl-1,2,3-thiadiazol-5-yl)methanol (CAS 1487974-93-5)
- 1-(2,4-Dimethylphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine (CAS 852313-96-3)
- N-Benzyl-3-fluoro-5-nitrobenzamide (CAS 1876900-11-6)
- 3-Phenylisochroman-8-ol (CAS 74794-57-3)
- (4-Tetrahydropyranyl)methanesulfonyl Chloride (CAS 264608-29-9)
- 3-Iodo-4-(2-methylpiperidin-1-yl)benzoic acid (CAS 1131614-59-9)
- Dibromobis(2-(2'-pyridyl)quinoline)rhodium(III) bromide (CAS 125955-74-0)
- 2,2',2'',2'''-(Cyclohexane-1,2-diylbis(azanetriyl))tetraacetic acid hydrate (CAS 145819-99-4)
- Opicapone Impurity 85 (CAS CATO-C4X-240485)
- Tau Peptide (295-309) trifluoroacetate salt (CAS 330456-46-7)
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