Dimethyl dithiophosphoric acid is the
organophosphorus compound with the formula (CH
3O)
2PS
2H. It is the processor for production of the
organothiophosphate Organothiophosphates or organophosphorothioates are a subclass of organophosphorus compounds. Many are used as pesticides, some have medical applications, and some are used as oil additives. They generally have the chemical formula (RO)3PS, RO)2 ...
insecticide Malathion. Although samples can appear dark, the compound is a colorless, distillable 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
Phosphorus pentasulfide is the inorganic compound with the formula (monomer) or (dimer). This yellow solid is the one of two phosphorus sulfides of commercial value. Samples often appear greenish-gray due to impurities. It is soluble in carbon d ...
with
methanol:
[ Lefferts, J. L.; Molloy, K. C.; Zuckerman, J. J.; Haiduc, I.; Guta, C.; Ruse, D., "Oxy and thio phosphorus acid derivatives of tin. 1. Triorganotin(IV) dithiophosphate esters", Inorganic Chemistry 1980, volume 19, 1662-1670. ]
:P
2S
5 + 4 CH
3OH → 2 (CH
3O)
2PS
2H + H
2S
See also
*
Ammonium diethyl dithiophosphate
*
Diethyl dithiophosphoric acid
*
Zinc dithiophosphate
Zinc dialkyldithiophosphates (often referred to as ZDDP) are a family of coordination compounds developed in the 1940s that feature zinc bound to the anion of a dialkyldithiophosphoric salt (e.g., ammonium diethyl dithiophosphate). These uncharge ...
References
{{Reflist
Organothiophosphate esters
Methoxy compounds