Cypermethrin is a synthetic pyrethroid insecticide that has a low toxicity to humans, pets and wildlife but is very effective against a wide range of insects including ants, fire ants, roaches, spiders and crickets. It is a fast-acting neurotoxin that is easily degraded on soil and plants but can be effective for weeks when applied to inert surfaces. Cypermethrin has become one of the most important insecticides in wide-scale use.

Cypermethrin acts as a stomach and contact insecticide. It has wide uses in cotton, cereals, vegetables and fruit, for food storage, in public health and in animal husbandry. Its structure is based on pyrethrum, a natural insecticide which is contained in chrysanthemum flowers, but it has a higher biological activity and is more stable than its natural model.

Domestic uses: Used for crack, crevice and spot treatment for control of insect pests in stores, warehouses, industrial buildings, houses, apartment buildings, greenhouses, laboratories and on ships, railcars, buses, trucks and aircraft. It may also be used in non-food areas in schools, nursing homes, hospitals, restaurants, hotels, and in food processing plants and as a barrier treatment insect repellent for horses.

Agricultural uses: Used to control many pests, including moth pests of cotton, fruit and vegetable crops (Extoxnet).

CAS Number: 52315-07-8
Molecular formula C22H19Cl2O3N
Molecular weight 416.3