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Cyhalothrin was developed in 1977 as a pesticide to be used against animal, public, and agricultural pests including beetles, aphids, and butterfly larvae (#INCHEM). The exposure to humans is very low and not likely to be a real threat.



Just the facts

Physical Information

Name: Cyhalothrin

Use: insecticide

Source: synthetic chemistry

Recommended daily intake: none

Chemical Structure

Structure retrieved from INCHEM


Chemical Description

Cyhalothrin is a yeloow-brown liquid that is insoluble in water and is formed by esterifying 3-(2-chloro-3,3,3-trifluoroprop-1-enyl)-2, 2-dimethylcyclopropanecarboxylic acid with alpha-cyano-3-phenoxybenzyl alcohol, and it consists of a mixture of four stereoisomers (#INCHEM).

Uses and Benefits

It is an insecticide used to control.

Health Effects

Cyhalothrin is moderately to highly toxic depending on the form one is exposed to, but chances of acute exposure is quite low. There have never been reported a case of human accidental poisoning.

Environmental Effects

Cylahothrin is considered anywhere from slightly toxic to practically non-toxic but is highly toxic to aquatic organisms and bees (#EXTOXNET). It is moderately persistent in soil, though there is little chance of it entering the groundwater in any hazardous level.


Cyholathrin is a Restricted Use Pesticide (RUP) and can only be purchased by certified applicators. It is in EPA Toxicity Class II, and products containing it must bear the signal word "WARNING" (#EXTOXNET).


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