1-Methyl-3,5-dinitro-1H-pyrazole CAS 32683-48-0
| CAS No. | 32683-48-0 |
| Molecular Formula | C4H4N4O4 |
| Molecular Weight | 172.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 172.10 g/mol gives 1-Methyl-3,5-dinitro-1H-pyrazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
1-Methyl-3,5-dinitro-1H-pyrazole (CAS 32683-48-0), molecular formula C4H4N4O4 and molecular weight 172.10 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4H4N4O4, 1-Methyl-3,5-dinitro-1H-pyrazole contains a carbohydrate-derived structure, an amide group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 172.10 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).
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 | C4H4N4O4 |
| Molecular Weight | 172.10 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 |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 4 |
Related Methyl Standards
- 4-Methyl-3,5-dinitro-1h-pyrazole (CAS 1246853-06-4)
- 1-Methyl-4,5-dinitro-1H-imidazole (CAS 19183-15-4)
- 1-Methyl-3,4-dinitro-1h-pyrazole (CAS 66296-67-1)
- 5-Methyl-3,4-dinitro-1h-pyrazole (CAS 38859-00-6)
- 201595-60-0 1,3-Dinitro(~13~C_6_)benzene DTXSID10583995 (CAS 201595-60-0)
- 3,6-Dinitro-pyridazine (CAS 439660-19-2)
- 3,4-dinitro-1H-pyrazole (CAS 38858-92-3)
- 2, 3-Dinitro-Pyridine-4-Amine (CAS 1805397-64-1)
Recommended Standards
- 2-(2,2,2-Trifluoroethoxy)propionic Acid (CAS 217806-37-6)
- 1,2-Dihydro-1,2,4,5-tetrazine-3,6-dicarboxylic acid (CAS 3787-09-5)
- 2-Amino-4,6-dihydroxy-5-nitropyrimidine (CAS 80466-56-4)
- 2-Hydroxy-2-(trifluoromethyl)butyric acid (CAS 72114-82-0)
- (2-(Isobutylamino)phenyl)methanol (CAS 121385-36-2)
- Dimethyl Succinate-d4 (CAS 30994-23-1)
- (5-Amino-2-(hydroxymethyl)phenyl)boronic acid (CAS 914397-76-5)
- 3-Iodo-4-methyl-1H-pyrrolo[2,3-b]pyridine (CAS 1190313-65-5)
- 4-(Methoxymethyl)-1H-pyrrole-2-carboxylic acid (CAS 1550887-26-7)
- Benzyl 2-methylpiperazine-1-carboxylate (CAS 444666-46-0)
- Isavuconazole Impurity 14 (CAS CATO-C4X-123614)
- N-((2,3-dihydrobenzo[b][1,4]dioxin-6-yl)methyl)butan-2-amine (CAS 940364-34-1)
- Methyl 6-amino-5-methoxypyrazine-2-carboxylate (CAS 566205-86-5)
- D-[Ser]8-Liraglutide (CAS CATO-C4X-199238)
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