| CAS Number | 156-43-4 |
|---|---|
| Molecular Formula | C8H11NO |
| Molecular Weight | 137.183 |
| InChI Key | IMPPGHMHELILKG-UHFFFAOYSA-N |
| LogP | 1.24 |
| Synonyms |
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Applications:
Uv-Vis Spectrum of 4-Ethoxyaniline
February 24, 2026
Access the UV-Vis Spectrum SIELC Library
If you are looking for optimized HPLC method to analyze 4-Ethoxyaniline check our HPLC Applications library
For optimal results in HPLC analysis, it is recommended to measure absorbance at a wavelength that matches the absorption maximum of the compound(s) being analyzed. The UV spectrum shown can assist in selecting an appropriate wavelength for your analysis. Please note that certain mobile phases and buffers may block wavelengths below 230 nm, rendering absorbance measurement at these wavelengths ineffective. If detection below 230 nm is required, it is recommended to use acetonitrile and water as low UV-transparent mobile phases, with phosphoric acid and its salts, sulfuric acid, and TFA as buffers.
For some compounds, the UV-Vis Spectrum is affected by the pH of the mobile phase. The spectra presented here are measured with an acidic mobile phase that has a pH of 3 or lower.
HPLC Method for Analysis of 4-ethoxyaniline on Primesep 100 Column
May 6, 2022
Separation type: Liquid Chromatography Mixed-mode
High Performance Liquid Chromatography (HPLC) Method for Analysis of 4-ethoxyaniline
4-Ethoxyaniline, also known as p-Phenetidine, is one of three Phenetidine isomers, and is commonly used as an intermediate product in drug and dye synthesis. 4-Ethoxyaniline can be retained and analyzed on a mixed-mode Primesep 100 column with a mobile phase consisting of water, Acetonitrile (MeCN), and Sulfuric acid (H2SO4). This analytical method can be UV detected at 200 nm with high resolution and peak symmetry.
| Column | Promesep 100, 4.6×150 mm, 100A |
| Mobile Phase | MeCN – 40% |
| Buffer | H2SO4 – 0.2% |
| Flow Rate | 1.0 ml/min |
| Detection | UV 200nm |
| Class of Compounds | Aromatic amine |
| Analyzing Compounds | 4-ethoxyaniline |
Application Column
Primesep 100
The Primesep family of mixed-mode columns offers a wide variety of stationary phases, boasting unprecedented selectivity in the separation of a broad array of chemical compounds across multiple applications. Corresponding Primesep guard columns, available with all stationary phases, do not require holders. SIELC provides a method development service available to all customers. Inquire about our specially-tailored custom LC-phases for specific separations.
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Separation of 4-Ethoxyaniline on Newcrom R1 HPLC column
February 16, 2018
4-Ethoxyaniline can be analyzed by this reverse phase (RP) HPLC method with simple conditions. The mobile phase contains an acetonitrile (MeCN), water, and phosphoric acid. For Mass-Spec (MS) compatible applications the phosphoric acid needs to be replaced with formic acid. Smaller 3 µm particles columns available for fast UPLC applications. This liquid chromatography method is scalable and can be used for isolation impurities in preparative separation. It also suitable for pharmacokinetics.
Application Column
Newcrom R1
The Newcrom columns are a family of reverse-phase-based columns. Newcrom A, AH, B, and BH are all mixed-mode columns with either positive or negative ion-pairing groups attached to either short (25 Å) or long (100 Å) ligand chains. Newcrom R1 is a special reverse-phase column with low silanol activity.
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