1,4-Dimethyl-5-nitro-1H-pyrazole CAS 70951-89-2
| CAS No. | 70951-89-2 |
| Molecular Formula | C5H7N3O2 |
| Molecular Weight | 141.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 141.13 g/mol gives 1,4-Dimethyl-5-nitro-1H-pyrazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 1,4-Dimethyl-5-nitro-1H-pyrazole (CAS 70951-89-2), a certified reference material (molecular formula C5H7N3O2, MW 141.13 g/mol) for analytical method development and quality control.
1,4-Dimethyl-5-nitro-1H-pyrazole (C5H7N3O2) 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 | C5H7N3O2 |
| Molecular Weight | 141.13 g/mol |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1977 |
| Nitrogen Atoms | 3 |
Related Dimethyl Standards
- 1,3-Dimethyl-1H-1,2,4-triazole-5-carboxylic acid (CAS 1023307-69-8)
- 1,3-Dimethyl-5-nitro-1h-pyrazole (CAS 1170783-25-1)
- 1,2-Dimethyl-4-nitro-1H-imidazole (CAS 13230-04-1)
- 4,5-Dimethyl-4H-1,2,4-triazole-3-carboxylic acid (CAS 1393540-04-9)
- 1,5-Dimethyl-1H-1,2,4-triazole-3-carboxylic acid (CAS 1393540-58-3)
- 3,5-Dimethyl-4-nitropyrazole (CAS 14531-55-6)
- 1,3-Dimethyl-4-nitro-1H-pyrazole (CAS 3920-38-5)
- 1,4-Dimethyl-3-nitro-1H-pyrazole (CAS 26956-09-2)
Recommended Standards
- 1,4-Dimethyl-5-nitroimidazole (CAS 57658-79-4)
- 1,5-Dimethyl-3-nitro-1h-pyrazole (CAS 59376-16-8)
- 1,1,1-Trifluoropentan-3-amine (CAS 764606-90-8)
- 1,5-Dimethyl-4-nitro-1H-pyrazole (CAS 3920-42-1)
- 2-Chloro-N-(1H-imidazol-2-yl)propanamide (CAS 52737-44-7)
- 5-Bromo-8-nitro-1-naphthaldehyde (CAS 679835-26-8)
- N-(3-(1H-Imidazol-1-yl)propyl)-3,4-dimethyl-5-nitrobenzenesulfonamide (CAS 898640-79-4)
- 2-(Dipropylamino)isonicotinonitrile (CAS 127680-85-7)
- 2-(Ethylamino)-2-methyl-3-(1h-pyrazol-1-yl)propanamide (CAS 1248421-16-0)
- 2-(3,5-Dichlorophenyl)morpholine oxalate (CAS 1171742-97-4)
- 1-(3-Fluorophenyl)-2-(isobutylthio)ethan-1-one (CAS 1152841-71-8)
- 3-(5-(4-Chlorophenyl)thiophen-2-yl)acrylic acid (CAS 950094-47-0)
- 2-Chloro-5,6-diphenylpyridine-3-carbonitrile (CAS 1292992-46-1)
- Semaglutide impurity 203 (CAS CATO-C4X-2226203)
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