alpha-Cypermethrin

Synonyms

(+-)-Alphamethrin; (1R cis S) and (1S cis R) enantiomeric isomer pair of alpha-Cyano-3-phenoxybenzyl-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylate; (1alpha(S*),3alpha)-(+-)-Cyano(3-phenoxyphenyl)methyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate; Aeralfam; Alfamethrin; Alfazot; Alfoxylate; Alphamethrin; Bestox; Cismix; Concord; Contest; Dominex; Fastac; Fastac 10 EC; Fendona; Mageos; Ultimate; WL 85871; alpha-Cypermetrin; [ChemIDplus]

Category

Pyrethrins/Pyrethroids

Description

Viscous yellowish brown semisolid mass; Colorless solid; [HSDB] Technical product is solid; [IPCS] White to pale yellow powder; [MSDSonline]

Sources/Uses

A highly active pyrethroid insecticide; Used to control a wide range of chewing and sucking insects in fruits, vegetables, vines, cereals, maize, cotton, rice, other crops, and forestry; Also used as insecticide for public health pests and animal ectoparasiticide; [HSDB]

Comments

Some technical formulations are strong eye irritants; Toxic neurological effects observed in high dose oral studies with rats include peripheral nerve injury; No significant adverse effects were observed from 90-day oral study with rats receiving 60 mg/kg; [HSDB] A respiratory tract irritant; [eChemPortal: ESIS] Effects in high-dose animal studies include liver changes, ataxia, and convulsions; [RTECS] Same ADI for alpha-Cypermethrin and Cypermethrin; [JECFA] See "Cypermethrin." See "Pyrethrum."

Not currently registered with the EPA for use in the US; [HSDB]

Biomedical References

1.73E-07 mm Hg

LC50 (rat) > 400 mg/m3/4h

Other CNS neurotoxin

Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion

Processes

Industrial Processes with risk of exposure:

• Farming (Pesticides)