1-tert-Butyl 4-ethyl 3-hydroxy-1H-pyrazole-1,4-dicarboxylate CAS 178424-17-4
| CAS No. | 178424-17-4 |
| Molecular Formula | C11H16N2O5 |
| Molecular Weight | 256.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 1-tert-Butyl 4-ethyl 3-hydroxy-1H-pyrazole-1,4-dicarboxylate (C11H16N2O5) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 256.26 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.
1-tert-Butyl 4-ethyl 3-hydroxy-1H-pyrazole-1,4-dicarboxylate (CAS 178424-17-4), molecular formula C11H16N2O5 and molecular weight 256.26 g/mol, is a CATO reference standard with documented purity and traceability.
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.
CATO manufactures 1-tert-Butyl 4-ethyl 3-hydroxy-1H-pyrazole-1,4-dicarboxylate 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 | C11H16N2O5 |
| Molecular Weight | 256.26 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2007 |
| Nitrogen Atoms | 2 |
Recommended Standards
- Rizatriptan Impurity 6 (CAS 177270-91-6)
- Methyl 5-(3-carbamoylphenyl)pyridine-2-carboxylate (CAS 1820614-23-0)
- (7-(3-Cyclopropyl-1,2,4-oxadiazol-5-yl)-[1,2,4]triazolo[4,3-a]pyridin-3-yl)methanamine (CAS 1710674-66-0)
- Methyl 2-({[(tert-butoxy)carbonyl]amino}methyl)-1,3-oxazole-4-carboxylate (CAS 182120-89-4)
- 7-(sec-Butyl)indoline-2,3-dione (CAS 57817-01-3)
- (2-Amino-3,4-dichlorophenyl)methanol (CAS 1595672-91-5)
- (2-(Difluoromethoxy)-5-methylphenyl)methanol (CAS 639826-21-4)
- 2-Chloro-3-(chloromethyl)-6-(difluoromethyl)pyridine (CAS 1806758-42-8)
- (5-Chlorobenzofuran-2-yl)boronic acid (CAS 223576-64-5)
- 2,2,2-Trifluoro-N-(4-isopropylphenyl)acetamide (CAS 75999-61-0)
- 84086-97-5 3,7-Dichloro-8-(dichloromethyl)quinoline DTXSID00517901 (CAS 84086-97-5)
- 2-(2,4-Dimethoxyphenyl)acetaldehyde (CAS 1057663-21-4)
- 26061-90-5 2-Propenoic acid, 2-methyl-, oxiranylmethyl ester, polymer with ethene Ethylene, oxiranylmethyl 2-methyl-2-propenoate polymer Ethylene, polymer with 2-propenoic acid, 2-methyl-, oxiranylmethyl ester 2-Propenoic acid, 2-methyl-, 2-oxiranylmethyl ester, polymer with ethene (CAS 26061-90-5)
- Semaglutide Impurity 152 xTFA (CAS CATO-C4X-2226152)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com