Diethyl terephthalate

Diethyl terephthalate structural formula

CAS Number636-09-9
Molecular FormulaC12H14O4
Molecular Weight222.241
  • Diethyl terephthalate
  • Diethyl benzene-1,4-dicarboxylate
  • 1,4-Benzenedicarboxylic acid, diethyl ester
  • 636-09-9
  • BRN 0650906
  • p-Diethyl phthalate
  • EINECS 211-249-1
  • NSC 68816


Separation of Diethyl terephthalate on Newcrom R1 HPLC column

May 16, 2018
Separation of Diethyl terephthalate on Newcrom R1 HPLC column

Diethyl terephthalate 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:
Diethyl terephthalate
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.