3-Methyl-2-(2-phenylethyl)butanoic acid CAS 70777-57-0
| CAS No. | 70777-57-0 |
| Molecular Formula | C13H18O2 |
| Molecular Weight | 206.28 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Methyl-2-(2-phenylethyl)butanoic acid (CAS 70777-57-0) is a high-purity analytical reference standard with the molecular formula C13H18O2 and a molecular weight of 206.28 g/mol.
3-Methyl-2-(2-phenylethyl)butanoic acid (C13H18O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. 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 presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
As a certified reference material (CRM), 3-Methyl-2-(2-phenylethyl)butanoic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C13H18O2 |
| Molecular Weight | 206.28 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
Related Methyl Standards
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- 2-(2-Phenylethyl)pentanoic acid (CAS 70777-56-9)
- 2-Phenylethyl Isovalerate (CAS 140-26-1)
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- 1-Phenylethyl 3-Oxobutanoate (CAS 40552-84-9)
- N-(1-phenylethyl)hexan-2-amine (CAS 1157155-49-1)
Recommended Standards
- 3-Isopropyl-4-propoxybenzaldehyde (CAS 883538-71-4)
- 3-Methyl-2-(4-methylbenzyl)butanoic acid (CAS 858217-10-4)
- 3-Hydroxy-2-methyl-1-phenylhexan-1-one (CAS 81733-92-8)
- 3-Methyl-4-(pentyloxy)benzaldehyde (CAS 820237-04-5)
- Gadobutrol Impurity 14 (CAS 220182-11-6)
- N-(1-Methoxypropan-2-yl)-5-(tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-amine (CAS 2490666-16-3)
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- trans-4-Hydroxycyclohexane-1-carboxylic acid benzyl ester (CAS 933448-77-2)
- N-(4-Methoxyphenyl)-3-phenyl-5-propylpyrazolo[1,5-a]pyrimidin-7-amine (CAS 890626-72-9)
- 2-(1,3,4-Thiadiazol-2-ylsulfanyl)acetic acid (CAS 53030-41-4)
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- 2-(2-Methylbenzylidene)malononitrile (CAS 2698-44-4)
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