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 (klôr-pîr′ə-fŏs′, -pī′rə-)
A toxic organophosphate compound, C9H11Cl3NO3PS, widely used as an insecticide in agriculture and on golf courses and wood products.

[chlor(o)- + pyri(dine) + alteration of phos(phate).]
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Noun1.chlorpyrifos - a common organophosphate insecticide
organophosphate - an insecticide that interferes with an insect's nervous system
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References in periodicals archive ?
Chlorpyrifos is an organophosphate pesticide that is characterized as a strong toxin.
As a results, imported produce often contains much higher average levels of chlorpyrifos and other pesticides than U.
Nichirei's turn came June 11, when Tokyo health authorities found six times the level of chlorpyrifos allowed by law in spinach it had imported from China.
Chlorpyrifos was originally marketed in the United States in the 1960s and is now one of the world's leading pesticides.
Decisions on chlorpyrifos got an average grade because although the chemical was restricted in three food uses, the CU notes, many other uses that were left unchanged accounted for one-third of children's total exposure to this toxic chemical in food.
Should risk assessments result in detection of risk of concern to the Agency, cancellation or mitigations of use may follow, as exemplified by recent chlorpyrifos and diazinon use cancellations.
The pesticide, called Chlorpyrifos, was invented by the Nazis for nerve gases and has been blamed for the recent death of an Irish farmer.
Chlorpyrifos, sold under the trade name Dursban, is found in more than 800 products used on termites, weeds, flea and tick treatments, and several other insect killers.
Experts are unsure whether chlorpyrifos - the active ingredient in Dursban - or an inert ingredient, or a combination of ingredients may be causing health problems, LaFave said.
Lier Chemical announces to shut down its raised chlorpyrifos production lines on 20 Nov.
Chlorpyrifos 48 ec insecticide (presentation of 1 liter),lot i.