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CAS number 29232-93-7 YesY
PubChem 34526
ChemSpider 31773 N
KEGG C18403 YesY
Jmol-3D images Image 1
Molecular formula C11H20N3O3PS
Molar mass 305.33 g mol−1
Appearance Straw-colored liquid
Density 1.147 g/mL (30 °C)
Melting point 15 to 18 °C (59 to 64 °F; 288 to 291 K)
Boiling point decomposes before boiling
Solubility in water 5.0 mg/L (30 °C)
EU classification Harmful (Xn), Dangerous for the environment(N)
R-phrases R22, R50/53
S-phrases (S2), S60, S61
Flash point 46 °C (115 °F; 319 K)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references
Organophosphate insecticide with pirimiphos-methyl (no longer in production)

Pirimiphos-methyl is a phosphorothioate used as an insecticide. It was originally developed by Imperial Chemical Industries Ltd., now Syngenta, in 1967.[1]

This is one of several compounds used for vector control of Triatoma. These insects are implicated in the transmission of Chagas disease in the Americas.[2] Pirimiphos-methyl can be applied as an interior surface paint additive, in order to achieve a residual pesticide effect.

Pyrimiphos-ethyl is a related insecticide in which the methyl groups are replaced with ethyl groups.


  1. ^ [1][dead link]
  2. ^ CHAPTER 3: Triatomine bugs, Vectors of Chagas disease, World Health Organization

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