Ethyl 5-ethoxy-1,4-dimethyl-1H-pyrazole-3-carboxylate CAS 1239844-62-2
| CAS No. | 1239844-62-2 |
| Molecular Formula | C10H16N2O3 |
| Molecular Weight | 212.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Ethyl 5-ethoxy-1,4-dimethyl-1H-pyrazole-3-carboxylate (CAS 1239844-62-2), molecular formula C10H16N2O3 and molecular weight 212.25 g/mol, is a CATO reference standard with documented purity and traceability.
Ethyl 5-ethoxy-1,4-dimethyl-1H-pyrazole-3-carboxylate (C10H16N2O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C10H16N2O3 |
| Molecular Weight | 212.25 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 |
| 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.) | 1990 |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
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Recommended Standards
- 1-{[3-(methoxymethyl)-1,2,4-oxadiazol-5-yl]methyl}piperazine (CAS 1239771-52-8)
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- Ethyl 5-isopropoxy-1-methyl-1H-pyrazole-3-carboxylate (CAS 1239763-53-1)
- Methyl 2-amino-3-(3,5-dimethyl-1h-1,2,4-triazol-1-yl)-2-methylpropanoate (CAS 1247686-51-6)
- Methyl 2-hydroxy-4-[4-(methoxycarbonyl)phenyl]benzoate (CAS 848155-29-3)
- 4-[(4-tert-Butylphenyl)sulfanyl]-5-(4-methylbenzenesulfonyl)-2-phenylpyrimidine (CAS 478247-30-2)
- 1-(2-Chlorophenyl)-2-methoxyethan-1-one (CAS 1157137-09-1)
- Imidazole Pyruvic acid (CAS 2504-83-8)
- 4-Hydrazinyl-2,5,6-trimethylthieno[2,3-d]pyrimidine (CAS 77995-55-2)
- N-Methyl-N-(2-methylacridin-9-yl)acetamide (CAS 61981-68-8)
- 2-(4-Methanesulfonyl-phenyl)-2,6-dihydro-4H-thieno[3,4-c]pyrazol-3-ylamine (CAS 1418273-64-9)
- 4-Trifluoromethoxy-butyl-ammonium;chloride (CAS 1286744-21-5)
- 4-Methyl-4-nitropentan-1-ol (CAS 5215-92-9)
- Protein Kinase C? Peptide Substrate (CAS 120253-69-2)
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