3-Oxo-3-(m-tolyl)propionic acid ethyl ester 33166-79-9 Ethyl (3-methylbenzoyl)acetate Ethyl 2-(3-methylbenzoyl)acetate Ethyl 3-oxo-3-(m-tolyl)propanoate Ethyl 3-oxo-3-(m-tolyl)propionate Ethyl m-methylbenzoylacetate Ethyl m-toluoylacetate CAS 33166-79-9
| CAS No. | 33166-79-9 |
| Molecular Formula | C12H20O3 |
| Molecular Weight | 212.29 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-Oxo-3-(m-tolyl)propionic acid ethyl ester 33166-79-9 Ethyl (3-methylbenzoyl)acetate Ethyl 2-(3-methylbenzoyl)acetate Ethyl 3-oxo-3-(m-tolyl)propanoate Ethyl 3-oxo-3-(m-tolyl)propionate Ethyl m-methylbenzoylacetate Ethyl m-toluoylacetate (CAS 33166-79-9) is a high-purity analytical reference standard with the molecular formula C12H20O3 and a molecular weight of 212.29 g/mol.
Based on its molecular formula C12H20O3, 3-Oxo-3-(m-tolyl)propionic acid ethyl ester 33166-79-9 Ethyl (3-methylbenzoyl)acetate Ethyl 2-(3-methylbenzoyl)acetate Ethyl 3-oxo-3-(m-tolyl)propanoate Ethyl 3-oxo-3-(m-tolyl)propionate Ethyl m-methylbenzoylacetate Ethyl m-toluoylacetate contains a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 212.29 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 | C12H20O3 |
| Molecular Weight | 212.29 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1966 |
Recommended Standards
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