4-Formyl-1-methyl-5-oxo-4,5-dihydro-1H-pyrazole-3-carbonitrile CAS 142966-21-0
| CAS No. | 142966-21-0 |
| Molecular Formula | C6H5N3O2 |
| Molecular Weight | 151.12 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.
4-Formyl-1-methyl-5-oxo-4,5-dihydro-1H-pyrazole-3-carbonitrile (CAS 142966-21-0), molecular formula C6H5N3O2 and molecular weight 151.12 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C6H5N3O2, 4-Formyl-1-methyl-5-oxo-4,5-dihydro-1H-pyrazole-3-carbonitrile 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 151.12 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 4-Formyl-1-methyl-5-oxo-4,5-dihydro-1H-pyrazole-3-carbonitrile 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 | C6H5N3O2 |
| Molecular Weight | 151.12 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1997 |
| Nitrogen Atoms | 3 |
Related Formyl Standards
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Recommended Standards
- D (CAS 139657-63-9)
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