(2Z)-1-[1-(4-Chlorophenyl)-5-hydroxy-3-methyl-1H-pyrazol-4-yl]-3-hydroxybut-2-en-1-one CAS 129302-13-2
| CAS No. | 129302-13-2 |
| Molecular Formula | C14H13ClN2O3 |
| Molecular Weight | 292.72 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 292.72 g/mol gives (2Z)-1-[1-(4-Chlorophenyl)-5-hydroxy-3-methyl-1H-pyrazol-4-yl]-3-hydroxybut-2-en-1-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
(2Z)-1-[1-(4-Chlorophenyl)-5-hydroxy-3-methyl-1H-pyrazol-4-yl]-3-hydroxybut-2-en-1-one (CAS 129302-13-2) is a high-purity analytical reference standard with the molecular formula C14H13ClN2O3 and a molecular weight of 292.72 g/mol.
The molecular framework of (2Z)-1-[1-(4-Chlorophenyl)-5-hydroxy-3-methyl-1H-pyrazol-4-yl]-3-hydroxybut-2-en-1-one (C14H13ClN2O3) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 | C14H13ClN2O3 |
| Molecular Weight | 292.72 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
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