4-(4-Ethoxy-3,5-dimethylphenyl)butanoic acid CAS 899349-88-3
| CAS No. | 899349-88-3 |
| Molecular Formula | C14H20O3 |
| Molecular Weight | 236.31 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-(4-Ethoxy-3,5-dimethylphenyl)butanoic acid (CAS 899349-88-3), molecular formula C14H20O3 and molecular weight 236.31 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 4-(4-Ethoxy-3,5-dimethylphenyl)butanoic acid (C14H20O3) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C14H20O3 |
| Molecular Weight | 236.31 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
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Recommended Standards
- 4-([1,1'-Biphenyl]-4-yl)-2-methylbut-3-yn-2-ol (CAS 80033-02-9)
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- Albendazole impurity 34 (CAS CATO-C4X-153534)
- 2-Allyl-2-methylcyclopentane-1,3-dione (CAS 26828-48-8)
- Ketorolac Trometamol (CAS 74103-07-4)
- 6-Chloro-2-methyl-5-(trifluoromethyl)-3-pyridinecarbonitrile (CAS 2417423-23-3)
- Semaglutide impurity 91 (CAS CATO-C4X-222691)
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