Methyl 5-oxo-4,5-dihydro-1h-pyrazole-3-carboxylate CAS 79746-67-1
| CAS No. | 79746-67-1 |
| Molecular Formula | C5H6N2O3 |
| Molecular Weight | 142.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 142.11 g/mol gives Methyl 5-oxo-4,5-dihydro-1h-pyrazole-3-carboxylate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Methyl 5-oxo-4,5-dihydro-1h-pyrazole-3-carboxylate (CAS 79746-67-1), a certified reference material (molecular formula C5H6N2O3, MW 142.11 g/mol) for analytical method development and quality control.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Methyl 5-oxo-4,5-dihydro-1h-pyrazole-3-carboxylate is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 142.11 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).
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 Methyl 5-oxo-4,5-dihydro-1h-pyrazole-3-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 | C5H6N2O3 |
| Molecular Weight | 142.11 g/mol |
| 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 |
| CAS Registry Year (est.) | 1979 |
| Nitrogen Atoms | 2 |
Recommended Standards
- Methyl 5-oxo-2,5-dihydro-1H-pyrazole-3-carboxylate (CAS 86625-25-4)
- Muconic acid (CAS 505-70-4)
- Methyl 5-methyl-1,3,4-oxadiazole-2-carboxylate (CAS 37641-35-3)
- 1,2,3,4-benzenetetrol (CAS 642-96-6)
- 2-({[3-(trifluoromethyl)phenyl]methyl}sulfanyl)quinoxaline (CAS 338977-86-9)
- 261763-00-2 3'-Chloro-2'-fluoro-5'-(trifluoromethyl)acetophenone MFCD01631398 (CAS 261763-00-2)
- 1-(2-Chloropyridin-3-yl)-3-(dimethylamino)prop-2-en-1-one (CAS 166196-84-5)
- Ethyl 2-amino-4-oxo-4,5-dihydrofuran-3-carboxylate (CAS 36717-52-9)
- 2-Chloro-6-(pyrrolidin-1-yl)-4-(trifluoromethyl)pyridine (CAS 1053657-79-6)
- 1-(2,6-Difluorophenyl)butan-1-amine (CAS 1270479-76-9)
- Benzyl ((3-fluoropyrrolidin-3-yl)methyl)carbamate hydrochloride (CAS 1422344-31-7)
- 2-(7-Chlorobenzo[d][1,3]dioxol-5-yl)-N-methylethan-1-amine (CAS 1341303-02-3)
- N-cyclopentyl-3-fluoropyridin-2-amine (CAS 693235-18-6)
- Peptide Impurity 13 (CAS CATO-CPTD788813)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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