Pyrethroid insecticides
[Cypermethrin] CAS[52315-07-8] UN3352
= alpha-Cyano-3-phenoxybenzyl(1RS)cis, trans-3-(2,2-dichlorovinyl)-2,2-dimethyl-cyclopropanecarboxylate
Trade name
Cypermethrin (B): Barricade, Cymbush, Imparator, Kalf Super, NRDC-149(Shell, ICI, FMC), Ripcord
Chemical formula
C22H19Cl2NO3
Purpose for use
Synthetic pyrethroids have been introduced over the past two decades for agricultural and domestic use as replacements for more toxic pesticides, such as chlorinated hydrocarbons, organophosphates and carbamates. Cypermethrin is a type of cyanophenoxybenzyl pyrethroid and is categorized as restricted use pesticide (RUP) by US EPA because of its high toxicity to fish. (ref. ID; 6698)
The recommended doses are 0.02-0.075 kg a.i. ha-1. (ref. ID; 2848, 2851)
Test organisms
Protozoa: Cyclopyxis kahli (ref. ID; 2848, 2851)
Oligochaeta: Branchiura sowerbyi (ref. ID; 6698)
Oligochaeta: Eisenia foetida (ref. ID; 7012)
Oligochaeta: Perionyx excavatus (ref. ID; 7085)
[Fenvalerate] CAS[51630-58-1] UN2902
= alpha-Cyano-3-phenoxybenzyl-2-(4-chlorophenyl)-3-methylbuturate)
Trade name
Fenvalerate (I): Belmark, Ectrin, Pydrin, Sumicidin
Chemical formula
C25H22ClNO3
Purpose for use
Pyrethroid insecticide.
Test organisms
Protozoa: Blepharisma undulans (ref. ID; 496)
Protozoa: Colpoda cucullus (ref. ID; 496)
Protozoa: Oikomonas termo (ref. ID; 496)
Oligochaeta: Eisenia foetida (ref. ID; 7012)
[Permethrin]
= 3-Phenoxybenzyl-3-(2,2-dichlorovinyl)-2,2-dimethyl-cyclopropane-carboxylate,
= 3-Phenoxybenzyl(1RS)cis, trans-3-(2,2-dichlorovinyl)-2,2-dimethyl-cyclopropanecarboxylate
Trade name
Permethrin (I, B): Adion, Ambush, Ambushfog, Coopex, Ectiban, Kalif, Matadan, NRDC-143, Outflank, Perigen, Perthrine, Pounce, Qamlin, Stockade, Stomoxin P, Talcord
Chemical formula
C21H20Cl2O3
Purpose for use
Pyrethroid insecticide.
Toxicity
LD50 (oral): (R:S=40:60) rat (male) 430 mg, rat (female) 470 mg.
Test organisms
Protozoa: Tetrahymena pyriformis (ref. ID; 6097)
Oligochaeta: Eisenia foetida (ref. ID; 7012)