Demeton-S structural formula

CAS Number126-75-0
Molecular FormulaC8H19O3PS2
Molecular Weight258.330
  • Demeton-S
  • O,O-Diethyl S-[2-(ethylsulfanyl)ethyl] phosphorothioate
  • Phosphorothioic acid, O,O-diethyl S-[2-(ethylthio)ethyl] ester
  • 126-75-0
  • Disulfoton oxon
  • BRN 1709166
  • Demetonthiol
  • Diethyl S-(2-ethioethyl)thiophosphate
  • O,O-Diethyl S-(2-eththioethyl)phosphorothioate
  • O,O-Diethyl S-ethyl-2-ethylmercaptophosphorothiolate
  • O,O-Diethyl S-2-(ethylthio)ethyl phosphorothioate
  • O,O-Diethyl S-(2-(ethylthio)ethyl) phosphorothiolate
  • EINECS 204-801-8
  • Ethanethiol, 2-(ethylthio)-, S-ester with O,O-diethyl phosphorothioate
  • Isodemeton
  • PO-Systox
  • Thiol systox
  • Thioldemeton
  • Izosystox
  • Mercaptofos teolovy
  • O,O-Diaethyl-S(2-aethylthio-aethyl)-monothiophosphat
  • O,O-Diethyl-S-(2-ethylthio-ethyl)-monothiofosfaat
  • O,O-Dietil-S-(2-etiltio-etil)-monotiofosfato
  • O,O-Dietyl-S-2-etylmerkaptoetyltiofosfat
  • Thiophosphate de O,O-diethyle et de S-(2-ethylthio-ethyle)
  • UNII-3UQ7N6O63K


Separation of Demeton-S on Newcrom R1 HPLC column

May 16, 2018
Separation of Demeton-S on Newcrom R1 HPLC column

Demeton-S 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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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.