The Q&A Archives: Chemical use

Question: Whats the difference between diazinon and dursban?

Answer: Diazinon (O,O-diethyl-O-(2-isopropyl-6-methyl-pyrimidine-4-yl)phosphorothioate), a colorless to dark brown liquid, is a thiophosphoric acid ester. It is a restricted use insecticide and kills insects by inhibiting acetylcholinesterase, an enzyme necessary for proper nervous system function.

Dursban is a product name for the chemical chlorpyrifos. Chlorpyrifos is one of the class of chemicals known as organophosphates. Dursban, and the rest of the organophosphate insecticides, work by interrupting the electrochemical process that nerves use to communicate with muscles and with one another.

They essentially work the same way - by interrupting the nervous system.

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