Ethyl 5-oxo-4,5-dihydro-1H-pyrazole-4-carboxylate CAS 99115-76-1
| CAS No. | 99115-76-1 |
| Molecular Formula | C6H8N2O3 |
| Molecular Weight | 156.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Ethyl 5-oxo-4,5-dihydro-1H-pyrazole-4-carboxylate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 156.14 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
Ethyl 5-oxo-4,5-dihydro-1H-pyrazole-4-carboxylate (CAS 99115-76-1) is a high-purity analytical reference standard with the molecular formula C6H8N2O3 and a molecular weight of 156.14 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures Ethyl 5-oxo-4,5-dihydro-1H-pyrazole-4-carboxylate 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 | C6H8N2O3 |
| Molecular Weight | 156.14 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 2 |
Recommended Standards
- Ethyl 5-oxo-4,5-dihydro-1H-pyrazole-3-carboxylate (CAS 58607-90-2)
- Ethyl isoxazol-3-ylcarbamate (CAS 860371-68-2)
- Ethyl 5-oxo-2,5-dihydro-1H-imidazole-4-carboxylate (CAS 952734-99-5)
- Ethyl isoxazol-5-ylcarbamate (CAS 859765-43-8)
- 1,3-Bis(hydroxymethyl)imidazolidine-2-thione (CAS 15534-95-9)
- (2R,3S)-3-Hydroxy-2-methylpentanoic Acid (CAS 77302-11-5)
- 2-((1-Phenylpropyl)amino)butan-1-ol (CAS 92111-48-3)
- Methyl-3-4-methoxyphenyl Glycidate (CAS 42245-42-1)
- 4,6-Dimethyl-2-thioxo-1,2-dihydropyridine-3-carbonitrile (CAS 54585-47-6)
- 1-Bromo-2-naphthalenecarboxaldehyde 1-bromo-2-naphthaldehyde 3378-82-3 (CAS 3378-82-3)
- 2-Amino-3-bromo-5-methylpyridine (CAS 17282-00-7)
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- (2R,3S,4S,5R)-6-azido-2,3,4,5-tetrahydroxy-hexanal 66927-03-5 CTK2F5527 (CAS 66927-03-5)
- Tirzepatide Impurity 44 (CAS CATO-C4X-324044)
Why CATO?
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