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IUPAC name 2-(Dimethoxyphosphinothioylthiomethyl)isoindoline-1,3-dione
Other names Fosmet
CAS number 732-11-6
PubChem 12901
Molecular formula C11H12NO4PS2
Molar mass 317.32 g mol-1
Appearance White to off-white crystals
Density 1.03 g/cm3
Melting point

72 °C, 345 K, 162 °F

Boiling point

Decomposes at >100 °C

Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Phosmet is a phthalimide-derived, non-systemic, organophosphate insecticide used on plants and animals. It is mainly used on apple trees for control of coddling moth, though it is also used on a wide range of fruit crops, ornamentals, and vines for the control of aphids, suckers, mites, and fruit flies.[2]



Phosmet is on the US Emergency Planning List of Extremely Hazardous Substances. It is highly toxic to bees.[2]

Mark Purdey has made the controversial suggestion that phosmet may have played a key role in the epidemic of bovine spongiform encephalopathy (BSE).[3]

In popular culture

  • In the medical drama House, the episode "Poison" features two teenage boys who are diagnosed with phosmet poisoning.

See also

  • Mark Purdey


  1. ^ Phosmet Safety Card. Retrieved on 2006-08-06.
  2. ^ a b Toxicology of Phosmet (Webpage). Retrieved on 2006-08-06.
  3. ^ Purdey M (1998). "High-dose exposure to systemic phosmet insecticide modifies the phosphatidylinositol anchor on the prion protein: the origins of new variant transmissible spongiform encephalopathies?". Med. Hypotheses 50 (2): 91-111. PMID 9572563.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Phosmet". A list of authors is available in Wikipedia.
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