Methyl 4-(4-ethylphenyl)-2,4-dioxobutanoate CAS 66751-98-2
| CAS No. | 66751-98-2 |
| Molecular Formula | C13H14O4 |
| Molecular Weight | 234.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Methyl 4-(4-ethylphenyl)-2,4-dioxobutanoate (CAS 66751-98-2) is a high-purity analytical reference standard with the molecular formula C13H14O4 and a molecular weight of 234.25 g/mol.
Methyl 4-(4-ethylphenyl)-2,4-dioxobutanoate (C13H14O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C13H14O4 |
| Molecular Weight | 234.25 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| 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 |
Related Methyl Standards
- 5-(4-Ethylphenyl)-3-methyl-5-oxopentanoic acid (CAS 951893-37-1)
- Ethyl 4-(4-ethylphenyl)-4-oxobutanoate (CAS 57821-79-1)
- 502651-40-3 6-(4-Ethylphenyl)-6-oxohexanoic acid DTXSID70620416 (CAS 502651-40-3)
- 1-(4-Ethylphenyl)-3-methyl-2-thioxoimidazolidin-4-one (CAS 692280-91-4)
- 3-((1-(4-Ethylphenyl)ethyl)amino)butanamide (CAS 1394661-69-8)
- 1,2-Bis(4-ethylphenyl)ethyne (CAS 79135-69-6)
- 2-(4-ethylphenyl)-2-[(trimethylsilyl)oxy]acetonitrile (CAS 1073135-75-7)
- 4-(4-Ethylphenyl)-2-hydrazono-5-methyl-2,3-dihydrothiazole (CAS 886494-55-9)
Recommended Standards
- Methyl 4-(3-allylureido)benzoate (CAS 345657-98-9)
- Methyl 4,6-O-Isopropylidene-α-D-mannopyranoside (CAS 63167-67-9)
- Methyl 3,7-dimethyl-1-oxoisochroman-3-carboxylate (CAS 890646-76-1)
- Methyl 4-C-Hydroxymethyl-2,3-O-isopropylidene-b-D-ribofuranoside (CAS 55797-67-6)
- (3-Phenoxypropyl)hydrazine (CAS 69781-95-9)
- 3-(bromomethyl)furan (CAS 63184-61-2)
- 2-(Difluoromethyl)-3-methoxy-4-nitropyridine-6-sulfonamide (CAS 1361912-01-7)
- 5,6-Dichloro-2,3-dicyanopyrazine (CAS 56413-95-7)
- 3-((4-Bromophenyl)sulfonyl)-2-hydroxy-2-methyl-N-(4-(trifluoromethyl)phenyl)propanamide (CAS 338956-13-1)
- 1-(3,5-Dimethylphenyl)-1H-1,2,4-triazole-3-carboxylic acid (CAS 1245644-75-0)
- Ethyl 2-(1,2,3,4-tetrahydroquinolin-6-yl)acetate (CAS 5622-58-2)
- 2-(4-Methyl-2-phenylthiazole-5-carbonyl)-3-phenylcyclopropane-1,1-dicarbonitrile (CAS 478041-06-4)
- 3-((4-Bromothiophen-2-yl)methoxy)azetidine (CAS 1309315-52-3)
- Peptide 431 (CAS CATO-CPTD788431)
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