1-Methyl-4-nitro-1H-pyrazole-3-carbaldehyde CAS 1287670-53-4
| CAS No. | 1287670-53-4 |
| Molecular Formula | C5H5N3O3 |
| Molecular Weight | 155.11 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.
1-Methyl-4-nitro-1H-pyrazole-3-carbaldehyde (CAS 1287670-53-4), molecular formula C5H5N3O3 and molecular weight 155.11 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C5H5N3O3, 1-Methyl-4-nitro-1H-pyrazole-3-carbaldehyde 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 155.11 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.
CATO manufactures 1-Methyl-4-nitro-1H-pyrazole-3-carbaldehyde under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5H5N3O3 |
| Molecular Weight | 155.11 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.) | 1990 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
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- 1-Methyl-4-nitro-1H-pyrazole-5-carbaldehyde (CAS 1517860-48-8)
- 1-Methyl-5-nitro-1,2-dihydropyrimidin-2-one (CAS 17758-39-3)
- 1-(4-Nitro-1H-pyrazol-1-yl)ethanone (CAS 98024-65-8)
- 1-(4-Nitro-1H-pyrazol-5-yl)ethanone (CAS 2228374-35-2)
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Recommended Standards
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- 1-Hydroxy-2-oxo-1,2-dihydropyridine-4-carboxylic acid (CAS 119736-22-0)
- 1-Methyl-4-(2,2,2-trifluoroacetyl)-1H-pyrrole-2-carbaldehyde (CAS 482584-40-7)
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- 2-Methyl-5-(pyridin-3-yl)-1,3,4-oxadiazole (CAS 89546-87-2)
- 1,1-Difluoro-5-azaspiro[2.6]nonane (CAS 1393572-17-2)
- N-(4-fluorobenzyl)-1,3,4-thiadiazol-2-amine (CAS 1339522-37-0)
- 5-[2-(Trifluoromethyl)phenyl]-1h-pyrazole-4-carboxylic acid (CAS 1152539-99-5)
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