Diethyl dithiophosphoric acid, sometimes mistakenly called diethyl dithiophosphate, is the

organophosphorus compound Organophosphorus compounds are organic compounds containing phosphorus. They are used primarily in pest control as an alternative to chlorinated hydrocarbons that persist in the environment. Some organophosphorus compounds are highly effective in ...

with the formula (C₂H₅O)₂PS₂H. It is the processor for production of the

organophosphate In organic chemistry, organophosphates (also known as phosphate esters, or OPEs) are a class of organophosphorus compounds with the general structure , a central phosphate molecule with alkyl or aromatic substituents. They can be considered a ...

insecticide Insecticides are substances used to kill insects. They include ovicides and larvicides used against insect eggs and larvae, respectively. Insecticides are used in agriculture, medicine, industry and by consumers. Insecticides are claimed to b ...

Terbufos Terbufos is a chemical compound used in insecticides and nematicides. Terbufos is part of the chemical family of organophosphates. It is a clear, colourless to pale yellow or reddish-brown liquid and sold commercially as granulate. History Terb ...

. Although samples can appear dark, it is a colorless liquid.J. Svara, N. Weferling, T. Hofmann "Phosphorus Compounds, Organic" in ''Ullmann's Encyclopedia of Industrial Chemistry'', Wiley-VCH, Weinheim, 2006. It is prepared by treating phosphorus pentasulfide with

ethanol Ethanol (abbr. EtOH; also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound. It is an Alcohol (chemistry), alcohol with the chemical formula . Its formula can be also written as or (an ethyl ...

: :P₂S₅ + 4 C₂H₅OH → 2 (C₂H₅O)₂PS₂H + H₂S

Reactions

Diethyl- and

dimethyl dithiophosphoric acid Dimethyl dithiophosphoric acid is the organophosphorus compound with the formula (CH3O)2PS2H. It is the processor for production of the organothiophosphate insecticide Malathion. Although samples can appear dark, the compound is a colorless, dist ...

s react with bases. The results of this neutralization reaction are salts, e.g.,

ammonium diethyl dithiophosphate Ammonium diethyl dithiophosphate or more systematically ammonium ''O'',''O''′-diethyl dithiophosphate, is the ammonium salt of diethyl dithiophosphoric acid. It is used as a source of the (C2H5O)2PS2− ligand in coordination chemistry and in a ...

. Diethyl dithiophosphoric acid reacts with zinc oxide to give zinc dithiophosphate, which is used as an oil additive:H. Spikes "The history and mechanisms of ZDDP" Tribology Letters, Vol. 17, No. 3, October 2004. . :ZnO + 2 (C₂H₅O)₂PS₂H → C₂H₅O)₂PS₂sub>2Zn + H₂O

References

{{Reflist Organothiophosphate esters Ethyl esters

Reactions

See also

References