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Formothion is a systemic and contact organophosphate insecticide that is used sparingly on numerous small insects (#EXTOXNET). It is one of the least toxic of all the Organophosphates (#TOXMAP).


  1. #Chemical Description
  2. #Uses
  3. #Health Effects
  4. #Environmental Effects
  5. #Current Events
  6. #Regulation
  7. #External Links
  8. #References



    Just the facts

    Physical Information

    Name: Formothion

    Use: insecticide

    Source: synthetic chemistry

    Recommended daily intake: none

    Absorption: dermal, inhalation, ingestion

    Sensitive individuals: workers

    Toxicity/symptoms: Cholinesterase Inhibitor

    Chemical Structure

Chemical Description

Formothion is a systemic and contact organophosphate insecticide. At room temperature it is a pale yellow, odorless, viscous liquid and is miscible with alcohols, ether, chloroform, and others but is practically insoluble in water (#TOXMAP).

Health Effects

Acute Toxicity and Symtoms
Formothion is a cholinesterase inhibitor but is not irritating to the skin.

  • nausea or vomiting
  • dizziness and weakness
  • tightness in the chest and difficulty breathing (when inhaled)
  • may cause blurred vision, muscle spasms, or loss of coordination

Environmental Effects

It is not highly toxic to birds or aquatic organisms, but it is toxic it to bees (#EXTOXNET).



TOXMAP Chemical Page. Formothion. Accessed 6-19-07.

Extension Toxicology Network. Pesticide Information Profiles - Formothion. Accessed 6-19-07.

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