3-Hydrazono-5-methyl-4-nitro-2,3-dihydro-1H-pyrazole CAS 57097-82-2
| CAS No. | 57097-82-2 |
| Molecular Formula | C4H7N5O2 |
| Molecular Weight | 157.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Hydrazono-5-methyl-4-nitro-2,3-dihydro-1H-pyrazole (CAS 57097-82-2), molecular formula C4H7N5O2 and molecular weight 157.13 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4H7N5O2, 3-Hydrazono-5-methyl-4-nitro-2,3-dihydro-1H-pyrazole 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 157.13 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
As a certified reference material (CRM), 3-Hydrazono-5-methyl-4-nitro-2,3-dihydro-1H-pyrazole 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 | C4H7N5O2 |
| Molecular Weight | 157.13 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 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.) | 1973 |
| Nitrogen Atoms | 5 |
Related Hydrazono Standards
- 5-Ethyl-3-hydrazono-4-methoxy-2,3-dihydro-1H-pyrazole (CAS 141500-15-4)
- 2-Hydrazono-4-methoxy-1,3-dimethyl-2,3-dihydro-1H-imidazole (CAS 754201-35-9)
- 2-Hydrazono-5-nitro-1,2-dihydropyrimidine (CAS 17802-59-4)
- 2-Hydrazono-1,2-dihydrocyclohepta[b]pyrrole (CAS 102363-24-6)
- 3-Hydrazono-5,6-dimethyl-3,4-dihydropyrazin-2(1H)-one (CAS 140911-17-7)
- 2-Hydrazono-2H-pyrido[1,2-a]pyrimidine (CAS 727352-55-8)
- 2-Hydrazono-1,2,4,5,6,7-hexahydropyrazolo[1,5-a]pyridine (CAS 158355-42-1)
- 6-Hydrazono-3-methyl-5,6-dihydro-[1,2,4]triazolo[4,3-b]pyridazine (CAS 7190-90-1)
Recommended Standards
- 3-Ethoxy-4-nitro-1h-pyrazole (CAS 400878-03-7)
- 3-Methyl-2,4-dioxoimidazolidine-1-carboxamide (CAS 630112-53-7)
- 3-[(2,2,2-trifluoroethyl)amino]propan-1-ol (CAS 767629-92-5)
- 3-Nitro-1H-pyrazole-1-ethanol (CAS 956951-01-2)
- 3-Hexylisoxazol-5(4H)-one (CAS 146034-01-7)
- 1,5-Dimethyl-4-oxo-1,4,4a,5,6,7-hexahydroquinoline-3-carboxamide (CAS 88557-19-1)
- 2-(3-(2-Aminoethyl)-6-bromo-1h-indol-1-yl)acetamide (CAS 1334149-12-0)
- cis-1-(tert-Butoxycarbonyl)-4-(methylsulfonyl)pyrrolidine-2-carboxylic acid (CAS 1438241-22-5)
- 4-Ethyl-5-fluoronicotinonitrile (CAS 1428262-87-6)
- N-(1-(3-(trifluoromethyl)phenyl)ethyl)cyclopropanamine (CAS 926204-57-1)
- 1-[2-(4-bromophenyl)-4-methyl-1,3-thiazol-5-yl]ethan-1-ol (CAS 1248048-23-8)
- 2-(2-Ethoxyphenoxy)acetonitrile (CAS 6781-16-4)
- 2-Methoxy-4-(((5-thioxo-3-(m-tolyl)-1H-1,2,4-triazol-4(5H)-yl)imino)methyl)phenyl acetate (CAS 478256-22-3)
- Valosin Peptide (VQY), porcine (CAS 99510-37-9)
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