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A synthetic pyrethroid Insecticide. Permethrin is stable to light. Compared to other insecticides, pyrethrins have low toxicity to mammals. They break down fairly rapidly at leave no harmful residues. Permethrin is used for ticks, flies, bees, lice, and spiders. Some insect repellents also contain permethrin.

Synonyms and Related Terms

[(3-phenoxyphenyl)methyl-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate]; Constrain; Nix; Ambush; Eksmin; Talcord; 3-phenoxybenzyl (1RS)-cis-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate

Other Properties

Soluble in most organic solvents. Insoluble in water.

Composition C21H20Cl2O3
CAS 52645-53-1
Melting Point 35
Density 1.190-1.272
Molecular Weight mol. wt. = 391.3
Boiling Point 200

Hazards and Safety

Mildly irritating to skins and eyes.

International Chemical Safety Card

Sources Checked for Data in Record

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Marie Svoboda, Conservation Survey Index, unpublished, 1997
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 7321

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