Ochratoxin A

Ochratoxin A structural formula

CAS Number303-47-9
Molecular FormulaC20H18ClNO6
Molecular Weight403.821
InChI KeyRWQKHEORZBHNRI-BMIGLBTASA-N
LogP4.74
Synonyms
  • Ochratoxin A
  • N-[(3R)-5-Chloro-8-hydroxy-3-methyl-1-oxo-3,4-dihydro-1H-2-benzopyran-7-carbonyl]-L-phenylalanine
  • L-Phenylalanine, N-[[(3R)-5-chloro-3,4-dihydro-8-hydroxy-3-methyl-1-oxo-1H-2-benzopyran-7-yl]carbonyl]-
  • 303-47-9
  • OTA
  • 5-18-09-00056
  • L-Phenylalanine, N-[[(3R)-5-chloro-3,4-dihydro-8-hydroxy-3-methyl-1-oxo-1H-2-benzopyran-7-yl]carbonyl]-
  • (R)-N-((5-Chlor-3,4-dihydro-8-hydroxy-3-methyl-1-oxo-1H-benzo[c]pyran-7-yl)carbonyl)-3-phenylalanin
  • (R)-N-((5-chloro-3,4-dihydro-8-hydroxy-3-methyl-1-oxo-1H-benzo[c]pyran-7-yl)carbonyl)-3-phenylalanine
  • (R)-N-((5-chloro-3,4-dihydro-8-hydroxy-3-methyl-1-oxo-1H-benzo[c]pyranne-7-yl)carbonyl)-3-phenylalanine
  • (R)-N-((5-cloro-3,4-dihidro-8-hidroxi-3-metil-1-oxo-1H-benzo[c]pirano-7-il)carbonil)-3-fenilalanina
  • (R)-N-[(5-Chloro-3,4-dihydro-8-hydroxy-3-methyl-1-oxo-1H-benzo[c]pyran-7-yl)carbonyl]-3-phenylalanine
  • Alanine, N-[(5-chloro-8-hydroxy-3-methyl-1-oxo-7-isochromanyl)carbonyl]-3-phenyl-, (-)-
  • L-Phenylalanine, N-[(5-chloro-3,4-dihydro-8-hydroxy-3-methyl-1-oxo-1H-2-benzopyran-7-yl)carbonyl]-, (R)-
  • NSC 201422
  • NSC 221991
  • Phenylalanine-ochratoxin A
  • Phe-OTA
  • Antibiotic 9663
  • BRN 1301486
  • (R)-N-((5-Chloro-3,4-dihydro-8-hydroxy-3-methyl-1-oxo-1 H-2-benzopyran-7-yl)carbonyl)phenylalanine
  • N-(((3R)-5-Chloro-8-hydroxy-3-methyl-1-oxo-7-isochromanyl)carbonyl)-3-phenyl-L-alanine
  • (-)-N-((5-Chloro-8-hydroxy-3-methyl-1-oxo-7-isochromanyl)carbonyl)-3-phenylalanine
  • EINECS 206-143-7
  • NCI-C56586
  • Phenylalanine - ochratoxin A
  • UNII-1779SX6LUY
  • (R)-N-((5-chloro-3,4-dihydro-8-hydroxy-3-methyl-1-oxo-1H-2-benzopyran-7-yl)carbonyl)phenylalanine
  • N-(((3R)-5-chloro-8-hydroxy-3-methyl-1-oxo-7-isochromanyl)carbonyl)-3-phenyl-L-alanine

Applications:

Uv-Vis Spectrum of Ochratoxin A

March 27, 2026

Access the UV-Vis Spectrum SIELC Library

If you are looking for optimized HPLC method to analyze Ochratoxin A 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 compound was dissolved in Acetonitrile.

Application Analytes:
Ochratoxin A
SIELC Technologies usually develops more than one method for each compound. Therefore, this particular method may not be the best available method from our portfolio for your specific application. Before you decide to implement this method in your research, please send us an email to research@sielc.com so we can ensure you get optimal results for your compound/s of interest.

HPLC Analysis of Zearalenone and Ochratoxin A on Primesep B2 Mixed-Mode Column

May 11, 2015

Zearalenone and Ochratoxin A are harmful mycotoxins commonly found in grains and other foods. They were separated using the Primesep B2 reversed-phase anion-exchange mode column. Retention can be controlled by adjusting concentration of both acetonitrile and buffer.

Condition
Column Primesep B2, 4.6×150 mm, 5 µm, 100A
Mobile Phase MeCN/H2O
Buffer Formic Acid
Flow Rate 1.0 ml/min
Detection UV, 250 nm

 

Description
Class of Compounds
 Base, Acid, Hydrophilic, Ionizable
Analyzing Compounds Zearalenone, Ochratoxin A

 

Application Column

Primesep B2

Column Diameter: 4.6 mm
Column Length: 50 mm
Particle Size: 5 µm
Pore Size: 100 A
Column options: dual ended

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Application Analytes:
Ochratoxin A
Zearalenone
Application Detection:
ELSD Detection
UV Detection
SIELC Technologies usually develops more than one method for each compound. Therefore, this particular method may not be the best available method from our portfolio for your specific application. Before you decide to implement this method in your research, please send us an email to research@sielc.com so we can ensure you get optimal results for your compound/s of interest.