Tolfenamic acid

Tolfenamic acid structural formula

CAS Number13710-19-5
Molecular FormulaC14H12ClNO2
Molecular Weight261.710
  • Tolfenamic acid
  • 2-(3-Chloro-2-methylanilino)benzoic acid
  • Benzoic acid, 2-[(3-chloro-2-methylphenyl)amino]-
  • 13710-19-5
  • BRN 0657821
  • 2-((3-Chloro-2-methylphenyl)amino)benzoic acid
  • EINECS 237-264-3
  • N-(2-Methyl-3-chlorophenyl)anthranilic acid
  • Acide tolfenamique
  • Acido tolfenamico
  • Acidum tolfenamicum
  • Bifenac
  • UNII-3G943U18KM
  • N-(3-Chloro-2-methylphenyl)anthranilic acid
  • N-(3-Chloro-o-tolyl)-anthranilic acid


Separation of Tolfenamic acid on Newcrom R1 HPLC column

February 16, 2018
Separation of Tolfenamic acid on Newcrom C18 HPLC column

Tolfenamic acid 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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Application Analytes:
Tolfenamic acid
The result was obtained by a proprietary SIELC algorithm. It may deviate from the actual experimental data. The experimental data are available upon request. Contact us by e-mail: or by phone: 847-229-2629.