3-methyl-1h-pyrazole-5-carboxylic acid ethyl ester 4027-57-0 5-Methyl-2H-pyrazole-3-carboxylic acid ethyl ester ethyl 3-methyl-1h-pyrazole-5-carboxylate ethyl 3-methyl-5-pyrazolecarboxylate ethyl 3-methylpyrazole-5-carboxylate CAS 4027-57-0
| CAS No. | 4027-57-0 |
| Molecular Formula | C7H14N2O2 |
| Molecular Weight | 158.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-methyl-1h-pyrazole-5-carboxylic acid ethyl ester 4027-57-0 5-Methyl-2H-pyrazole-3-carboxylic acid ethyl ester ethyl 3-methyl-1h-pyrazole-5-carboxylate ethyl 3-methyl-5-pyrazolecarboxylate ethyl 3-methylpyrazole-5-carboxylate 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.
3-methyl-1h-pyrazole-5-carboxylic acid ethyl ester 4027-57-0 5-Methyl-2H-pyrazole-3-carboxylic acid ethyl ester ethyl 3-methyl-1h-pyrazole-5-carboxylate ethyl 3-methyl-5-pyrazolecarboxylate ethyl 3-methylpyrazole-5-carboxylate (CAS 4027-57-0), molecular formula C7H14N2O2 and molecular weight 158.20 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 3-methyl-1h-pyrazole-5-carboxylic acid ethyl ester 4027-57-0 5-Methyl-2H-pyrazole-3-carboxylic acid ethyl ester ethyl 3-methyl-1h-pyrazole-5-carboxylate ethyl 3-methyl-5-pyrazolecarboxylate ethyl 3-methylpyrazole-5-carboxylate (C7H14N2O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 2.0, corresponding to approximately 2 ring(s) or double-bond equivalent(s). With a molecular weight of 158.20 g/mol, it falls into the medium-molecular-weight range. 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.
Physical & Chemical Properties
| Molecular Formula | C7H14N2O2 |
| Molecular Weight | 158.20 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
Recommended Standards
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- 4,5,6,17,18,19-Hexamethyl 3,20-diazapentacyclo[11.7.0.0^{2,10}.0^{3,7}.0^{16,20}]icosa-1(13),2(10),4,6,8,11,14,16,18-nonaene-4,5,6,17,18,19-hexacarboxylate (CAS 194552-21-1)
- Semaglutide Impurity 151 xTFA (CAS CATO-C4X-2226151)
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