IUPAC name
O,O-dimethyl S-[2-(methylamino)-2-oxoethyl] dithiophosphate
Other names
O,O-dimethyl S-methylcarbamoylmethyl phosphorodithioate
Phosphorodithioic acid, O,O-Dimethyl S-(2-(methylamino)-2-oxoethylyl)ester
60-51-5 YesY
3D model (Jmol) Interactive image
ChEBI CHEBI:34714 YesY
ChemSpider 2973 YesY
ECHA InfoCard 100.000.437
KEGG C14326 YesY
PubChem 3082
UNII W6U08B045O YesY
Molar mass 229.26 g/mol
Appearance Grey-white crystalline solid
Density 1.3 g/cm3, solid
Melting point 43 to 45 °C (109 to 113 °F; 316 to 318 K)
Boiling point 117 °C (243 °F; 390 K) at 10 Pa
2.5 g/100 ml
Main hazards Highly toxic
Safety data sheet External MSDS
GHS pictograms [1]
H302 - H312[1]
Flash point 107 °C (225 °F; 380 K)
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

Dimethoate is a widely used organophosphate insecticide and acaricide. It was patented and introduced in the 1950s by American Cyanamid. Like other organophosphates, dimethoate is an acetylcholinesterase inhibitor which disables cholinesterase, an enzyme essential for central nervous system function. It acts both by contact and through ingestion. It is readily absorbed and distributed throughout plant tissues, but is degraded relatively rapidly.[2]


  1. 1 2 3 Sigma-Aldrich Co., Dimethoate. Retrieved on 2013-07-20.
  2. Dauterman, W. C.; Viado, G. B.; Casida, J. E.; O'Brien, R. D. (1960). "Insecticide Residues, Persistence of Dimethoate and Metabolites Following Foliar Application to Plants". Journal of Agricultural and Food Chemistry. 8 (2): 115. doi:10.1021/jf60108a013.
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