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Demeton is an organophosphate pesticide and acaricide and insecticide and is ranked in the top 10% most hazardous chemicals. It is toxic to humans, other mammals, aquatic organisms, and nontarget species.

Just the facts

Physical Information

Name: Demeton

Use: organophosphate pesticide

Source: synthetic chemistry

Recommended daily intake: none

Absorption: dermal, inhalation, ingestion

Sensitive individuals: workers


Regulatory facts:

Chemical Structure

Structure retrieved from INCHEM


Chemical Description

Demeton is a mixture of isomers that is colorless and has a strong sulfurous odor.

Pharmacology and Metabolism

Demeton is a Cholinesterase Inhibitor and seriously depresses the nervous system.


It is used as an acaricide and insecticide on a wide range of crops to control aphids, mites, whiteflies, thrips, and leafminers.

Health Effects

Demeton is seriously toxic to humans. A number of poisonings and even some deaths of workers exposed to large amounts of demeton have been observed.
"Early symptoms of poisoning may include excessive sweating, headache, weakness, giddiness, nausea, vomiting, hyper-salivation, stomach pains, blurred vision, slurred speech lacrimation, urination, diarrhea and muscle twitching. Later there may be convulsions and coma."


Protective clothing and glasses should be worn at all times when handling demeton. If exposed, one should remove all contaminated slothing, wash, and contact medical authorities.

External Links

  • OSHA - Demeton
  • Scorecard - Demeton
  • International Programme on Chemical Safety - Demeton|]

  • International Programme on Chemical Safety - Demeton Data Sheet|]



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