2-(4-Ethylphenyl)-3-methylbutanoic acid CAS 55776-81-3
| CAS No. | 55776-81-3 |
| Molecular Formula | C13H18O2 |
| Molecular Weight | 206.28 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 2-(4-Ethylphenyl)-3-methylbutanoic acid (C13H18O2) 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).
2-(4-Ethylphenyl)-3-methylbutanoic acid (CAS 55776-81-3) is a high-purity analytical reference standard with the molecular formula C13H18O2 and a molecular weight of 206.28 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.
CATO manufactures 2-(4-Ethylphenyl)-3-methylbutanoic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
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.) | 1972 |
Related Ethylphenyl Standards
- N-(4-ethylphenyl)-3-(methylamino)propanamide (CAS 1248129-50-1)
- 3-(4-Ethylphenyl)-3-methylbutanoic acid (CAS 132858-67-4)
- 3-(4-Ethylphenyl)-2-methylbutanoic acid (CAS 1525422-42-7)
- Methyl 2-(4-ethylphenyl)-2-methylpropanoate (CAS 698394-59-1)
- 3-(4-Ethylphenyl)-1,2,4-oxadiazole-5-thiol (CAS 1339756-90-9)
- 5-(4-ethylphenyl)-1,3,4-oxadiazole-2-thiol (CAS 750607-48-8)
- Ethyl 2-(3-ethylphenyl)-2-oxoacetate (CAS 1373519-65-3)
- 4-(4-Ethylphenyl)-4-oxobutanoic acid (CAS 49594-75-4)
Recommended Standards
- 2-(4-Aminophenyl)-n-tert-butylacetamide (CAS 926221-50-3)
- 2-(4-Isopropylphenyl)-2-methylpropanoic acid (CAS 57438-45-6)
- 2-(4-aminophenyl)-N,N-diethylacetamide (CAS 887479-45-0)
- 2-(4-Methoxyphenyl)cyclohexan-1-ol (CAS 89008-80-0)
- Methyl 4-amino-1-benzyl-1H-pyrazole-3-carboxylate (CAS 1021498-08-7)
- 4-(3-Bromopyridin-2-yl)thiomorpholine-3,5-dione (CAS 1871794-98-7)
- 3-Chloro-6-(3-chlorophenyl)-2-methylpyrazolo[1,5-a]pyrimidine (CAS 866132-38-9)
- N-(3-Chloro-4-methylphenyl)acetamide (CAS 7149-79-3)
- (S)-2-(1-Aminoethyl)benzoic acid (CAS 1187930-32-0)
- 1-(2-Chloro-6-fluorobenzyl)-5-methyl-3-nitro-1h-pyrazole (CAS 957487-87-5)
- (2R,3R,4S,5S)-2-(6-Amino-9H-purin-9-yl)-5-((sec-butylthio)methyl)tetrahydrofuran-3,4-diol (CAS 61839-10-9)
- E569WG6E60 182133-25-1 Arzoxifene [INN] 2-(p-Methoxyphenyl)-3-(p-(2-piperidinoethoxy)phenoxy)benzo(b)thiophene-6-ol Benzo(b)thiophene-6-ol, 2-(4-methoxyphenyl)-3-(4-(2-(1-piperidinyl)ethoxy)phenoxy)- Arzoxifene LY 353381 UNII-E569WG6E60 (CAS 182133-25-1)
- 2-Amino-6-methyl-8-propylpyrido[2,3-d]pyrimidin-4(8H)-one (CAS 786614-49-1)
- Glucagon receptor antagonist I (CAS 438618-32-7)
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