3-Ethyl-1-(2-hydroxyethyl)-1H-pyrazol-5(4H)-one CAS 866472-81-3
| CAS No. | 866472-81-3 |
| Molecular Formula | C7H12N2O2 |
| Molecular Weight | 156.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3-Ethyl-1-(2-hydroxyethyl)-1H-pyrazol-5(4H)-one (CAS 866472-81-3) is a high-purity analytical reference standard with the molecular formula C7H12N2O2 and a molecular weight of 156.18 g/mol.
3-Ethyl-1-(2-hydroxyethyl)-1H-pyrazol-5(4H)-one (C7H12N2O2) 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.
Physical & Chemical Properties
| Molecular Formula | C7H12N2O2 |
| Molecular Weight | 156.18 g/mol |
| Appearance | 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 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
- 2-(2-Hydroxyethyl)-6-methyl-4,5-dihydropyridazin-3(2H)-one (CAS 5843-91-4)
- 4-(2-Hydroxyethyl)-1,3-dimethyl-1H-pyrazol-5-ol (CAS 65288-02-0)
- 4-(2-Hydroxyethyl)-1,5-dimethyl-1H-pyrazol-3(2H)-one (CAS 258281-03-7)
- 4-(2-Hydroxyethyl)-2,5-dimethylpyrazol-3-one (CAS 258281-02-6)
- 4-(2-Hydroxyethyl)-3,4-dimethyl-1H-pyrazol-5(4H)-one (CAS 401934-50-7)
- 5-(2-Hydroxyethyl)thiophene-2-carbaldehyde (CAS 131202-63-6)
- 2-Hydroxyethyl Methanethiosulfonate (CAS 13700-08-8)
- 1-(2-Hydroxyethyl)-1H-pyrazole-4-carboxylic acid (CAS 1006469-47-1)
Recommended Standards
- 3-Cyclopropoxycyclobutanecarboxylic acid (CAS 2518152-53-7)
- 3-Ethyl-1,5-dimethylimidazolidine-2,4-dione (CAS 615248-01-6)
- 3-Cyclopentyl-2-oxopropanoic acid (CAS 791040-02-3)
- 3-ethyl-5,5-dimethylimidazolidine-2,4-dione (CAS 37021-15-1)
- (S)-2-((tert-Butoxycarbonyl)amino)-4-(3,4,5-trimethoxyphenyl)butanoic acid (CAS 1260589-57-8)
- EThyl 1-isocyanocyclohexanecarboxylate (CAS 97846-69-0)
- (6-Methoxy-2-methylpyridin-3-yl)methanol (CAS 32383-10-1)
- 2-chloro-N-{[(3-chlorophenyl)carbamoyl]methyl}-N-methylacetamide (CAS 2060063-94-5)
- 4-(chloromethyl)-3,5-dimethyl-1-phenyl-1H-pyrazole hydrochloride (CAS 1354963-39-5)
- 2-(3-Methyl-1,2,4-oxadiazol-5-yl)thiophen-3-amine (CAS 1040011-34-4)
- 1-(Cyclopropylmethyl)-1H-imidazol-2-amine (CAS 1178625-93-8)
- N-(2,2-dimethylpropyl)pyridin-2-amine hydrochloride (CAS 1909326-72-2)
- (2-(3,4-Dimethylphenyl)oxazol-4-yl)methanol (CAS 885272-90-2)
- Semaglutide Impurity 131 (CAS 2618647-80-4)
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