page_title: Diethyl dithiophosphoric acid
section_title: Reactions
hierarchical_section_title: Diethyl dithiophosphoric acid / Reactions
caption_attribution_description: Structure of Zn(dtp)2
context_page_description: Diethyl dithiophosphoric acid, sometimes mistakenly called diethyl dithiophosphate, is the organophosphorus compound with the formula (C₂H₅O)₂PS₂H. It is the processor for production of the organophosphate insecticide Terbufos. Although samples can appear dark, it is a colorless liquid.
  It is prepared by treating phosphorus pentasulfide with ethanol:
  P₂S₅ + 4 C₂H₅OH → 2 (C₂H₅O)₂PS₂H + H₂S
context_section_description: Diethyl- and dimethyl dithiophosphoric acids react with bases. The results of this neutralization reaction are salts, e.g., ammonium diethyl dithiophosphate.
  Diethyl dithiophosphoric acid reacts with zinc oxide to give zinc dithiophosphate, which is used as an oil additive:
  ZnO  +  2 (C₂H₅O)₂PS₂H   →   [(C₂H₅O)₂PS₂]₂Zn  +  H₂O
caption: Zinc dithiophosphate.
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