3-(2-Methoxy-5-methylphenyl)butanoic acid CAS 40267-33-2
| CAS No. | 40267-33-2 |
| Molecular Formula | C12H16O3 |
| Molecular Weight | 208.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 3-(2-Methoxy-5-methylphenyl)butanoic acid (C12H16O3) 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 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).
3-(2-Methoxy-5-methylphenyl)butanoic acid (CAS 40267-33-2) is a high-purity analytical reference standard with the molecular formula C12H16O3 and a molecular weight of 208.25 g/mol.
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 | C12H16O3 |
| Molecular Weight | 208.25 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.) | 1968 |
Related Methoxy Standards
- 3-Methoxy-2-(methoxymethyl)-1-phenyl-1-propanone (CAS 100257-34-9)
- 1-(4-Methoxy-3-propoxyphenyl)ethan-1-one (CAS 104226-65-5)
- Ethyl 4-methoxy-3,5-dimethylbenzoate (CAS 105401-94-3)
- 2-(2-Methoxy-5-methylphenyl)butanoic acid (CAS 1082453-44-8)
- Ethyl 4-methoxy-2,3-dimethylbenzoate (CAS 128209-84-7)
- Benzyl 2-Methoxy-2-methylpropionate (CAS 1363165-96-1)
- 4-Methoxy-3-methylphenethyl acetate (CAS 1443351-76-5)
- 2-(4-Methoxy-2-methylphenyl)butanoic acid (CAS 1497231-47-6)
Recommended Standards
- 3-(2,3,5-trimethylphenoxy)propanoic acid (CAS 63545-27-7)
- 3-(2-Methoxyphenyl)-2,2-dimethylpropanoic acid (CAS 566157-50-4)
- 3-(1,1-DIMETHYLETHYL)-4-HYDROXY-5-METHOXY-BENZALDEHYDE (CAS 33837-83-1)
- 3-(3,4-dimethoxyphenyl)butan-2-one (CAS 4156-24-5)
- 2-(Difluoromethyl)-3-iodo-4-nitropyridine-6-carboxamide (CAS 1805195-75-8)
- 3-Amino-2-hydroxy-N,N-dimethylbenzamide (CAS 464913-11-9)
- 3,5-Dichloropicolinaldehyde (CAS 471909-65-6)
- Cinnamyl (E)-3-(4-hydroxyphenyl)acrylate (CAS 115610-30-5)
- Methyl 4,5,6,7-tetrahydrobenzofuran-6-carboxylate (CAS 73568-02-2)
- 3-Oxo-2-(o-tolyl)pentanenitrile (CAS 1094385-98-4)
- 4-Amino-2-(butan-2-yl)phenol (CAS 13781-16-3)
- 1-(Isocyano(tosyl)methyl)-2,4-dimethylbenzene (CAS 1247878-30-3)
- Pregabalin Impurity 151 (CAS 57422-87-4)
- Semaglutide Impurity 161 (x TFA Salt) (CAS CATO-C4X-2226161)
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