Ethyl 5-oxo-5-(4-pentylphenyl)pentanoate CAS 898757-18-1
| CAS No. | 898757-18-1 |
| Molecular Formula | C18H26O3 |
| Molecular Weight | 290.40 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Ethyl 5-oxo-5-(4-pentylphenyl)pentanoate (CAS 898757-18-1), molecular formula C18H26O3 and molecular weight 290.40 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Ethyl 5-oxo-5-(4-pentylphenyl)pentanoate (C18H26O3) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 290.40 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C18H26O3 |
| Molecular Weight | 290.40 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
Recommended Standards
- Ethyl 5-(2,3,4,5,6-pentamethylphenyl)-5-oxovalerate (CAS 951889-58-0)
- Ethyl 6-(4-(tert-butyl)phenyl)-6-oxohexanoate (CAS 898778-44-4)
- Ethyl 4-(4-hexylphenyl)-4-oxobutanoate (CAS 312943-18-3)
- Ethyl 6-(4-butylphenyl)-6-oxohexanoate (CAS 951888-70-3)
- (5-Fluoro-2,3-dimethoxyphenyl)boronic acid (CAS 1257740-71-8)
- 2-(2-Bromo-4,5-diethoxyphenyl)acetonitrile (CAS 847744-26-7)
- trans-4-(Dibenzylamino)cyclohexanol (CAS 149506-81-0)
- ErlotiniB impurity 35 (CAS CATO-C4X-106935)
- tert-Butyl 4-(5-chloropyrazin-2-yl)piperazine-1-carboxylate (CAS 479226-58-9)
- 9-Hydroxy-2,7-diazaspiro[3.5]nonan-6-one 2,2,2-trifluoroacetate (CAS 2137773-84-1)
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