1-(2-Hydroxyethyl)-3-phenyl-1H-pyrazol-5(4H)-one CAS 67056-21-7
| CAS No. | 67056-21-7 |
| Molecular Formula | C11H12N2O2 |
| Molecular Weight | 204.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 1-(2-Hydroxyethyl)-3-phenyl-1H-pyrazol-5(4H)-one 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.
1-(2-Hydroxyethyl)-3-phenyl-1H-pyrazol-5(4H)-one (CAS 67056-21-7) is a high-purity analytical reference standard with the molecular formula C11H12N2O2 and a molecular weight of 204.23 g/mol.
Based on its molecular formula C11H12N2O2, 1-(2-Hydroxyethyl)-3-phenyl-1H-pyrazol-5(4H)-one contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 204.23 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C11H12N2O2 |
| Molecular Weight | 204.23 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 DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
| Nitrogen Atoms | 2 |
Related Hydroxyethyl Standards
- 4-(2-Hydroxyethyl)-3-phenyl-1H-pyrazol-5(4H)-one (CAS 10244-77-6)
- N-(2-Hydroxyethyl)-1H-indole-2-carboxamide (CAS 144969-97-1)
- 1-(2-hydroxyethyl)-3-phenyl-1h-pyrazol-5-ol (CAS 67000-28-6)
- 3-(2-Hydroxyethyl)-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (CAS 41078-67-5)
- 2-(1-Hydroxyethyl)-3-methylquinoxaline 1-oxide (CAS 1226491-97-9)
- 1-(2-Hydroxyethyl)-4,4-dimethoxycyclohexan-1-ol (CAS 93675-96-8)
- 3-((Ethyl(2-hydroxyethyl)amino)methyl)benzonitrile (CAS 1176018-44-2)
- 2-((Ethyl(2-hydroxyethyl)amino)methyl)benzonitrile (CAS 1176738-33-2)
Recommended Standards
- 1-(2-Ethylphenyl)imidazolidine-2,4-dione (CAS 755022-10-7)
- 1-(2-(Hydroxymethyl)-1-methyl-1H-benzo[d]imidazol-5-yl)ethanone (CAS 66353-40-0)
- 1-(3-amino-2-methylphenyl)pyrrolidine-2,5-dione (CAS 268738-23-4)
- 1-(2-((5-Cyanopyridin-2-yl)amino)ethyl)guanidine (CAS 252943-80-9)
- 4-Ethyloct-1-yn-3-ol (CAS 5877-42-9)
- 6-Methoxy-2-methyl-3,4-dihydroisoquinolin-1(2H)-one (CAS 35714-27-3)
- 2-Methyl-4-(4-methylphenyl)thiomorpholine-3,5-dione (CAS 344266-83-7)
- 4-(Imidazo[1,2-a]pyridin-3-yl)benzonitrile (CAS 59182-08-0)
- 5-Nitro-biphenyl-2-carboxylic acid (CAS 124391-60-2)
- Neostigmine impurity 46 (CAS CATO-C4X-204246)
- 1-(3,5-Dichlorobenzyl)pyrrolidine-3-carboxylic acid (CAS 1491876-41-5)
- 4,4'-(Propane-2,2-diyl)bis(2-aminophenol) (CAS 1220-78-6)
- 1390AC 2-(Piperidin-4-yl)-5-(pyridin-4-yl)-1,3,4-oxadiazole 732978-38-0 C12H14N4O (CAS 732978-38-0)
- A-18-F-NH2; Morphine Modulating Neuropeptide (CAS 99588-52-0)
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