Chemical Identification
Common Name
Cyhalothrin
中文通用名
氯氟氰菊酯
IUPAC
(RS)-α-cyano-3-phenoxybenzyl (1RS,3RS)-3-[(Z)-2-chloro-3,3,3-trifluoropropenyl]-2,2-dimethylcyclopropanecarboxylate
or
(RS)-α-cyano-3-phenoxybenzyl (1RS)-cis-3-[(Z)-2-chloro-3,3,3-trifluoropropenyl]-2,2-dimethylcyclopropanecarboxylate
CAS
cyano(3-phenoxyphenyl)methyl (1R,3R)-rel-3-[(1Z)-2-chloro-3,3,3-trifluoro-1-propenyl]-2,2-dimethylcyclopropanecarboxylate
CAS No.
68085-85-8
Molecular Formula
C23H19ClF3NO3
Molecular Structure
Category
Activity

Cyhalothrin is a pesticide to be used against animal, public, and agricultural pests including beetles, aphids, and butterfly larvae

CropUse
Wheat, Barley, Beans (dry) include Butter beans, Cow peas, Kidney beans, Lentil, Lima beans, Pegia, Sultani, Sultapyar and White beans, Potato, Sugar beet
Pest Spectrum
beetles, aphids, and butterfly larvae
Formulation
WP = Wettable powder
Premix
Thiamethoxam+lambda-cyhalothrin
Acetamiprid+lambda-cyhalothrin
Imidacloprid+lambda-cyhalothrin
Endosulfan+lambda-cyhalothrin
Lambda-cyhalothrin+buprofezin
Lambda-cyhalothrin+chlorantraniliprole
Lambda-cyhalothrin+chlorpyrifos
Lambda-cyhalothrin+diazinon
Lambda-cyhalothrin+fenitrothion
Lambda-cyhalothrin+Piperonyl butoxide+tetramethrin
Lambda-cyhalothrin+pirimicarb
Abamectin+lambda-cyhalothrin
Profenofos+lambda-cyhalothrin
Dichlorvos+lambda-cyhalothrin
Diafenthiuron+lambda-cyhalothrin
Spinosad+lambda-cyhalothrin
Lambda-cyhalothrin+emamectin benzoate
Lambda-cyhalothrin+dimethoate
Lambda-cyhalothrin+endosulfan+phoxim
Lambda-cyhalothrin+malathion
Lambda-cyhalothrin+methomyl
Lambda-cyhalothrin+methomyl+phoxim
Lambda-cyhalothrin+triazophos
Lambda-cyhalothrin+thiosultap-monosodium
Lambda-cyhalothrin+isocarbophos
Lambda-cyhalothrin+chlorpyrifos-methyl
Lambda-cyhalothrin+endosulfan
Lambda-cyhalothrin+malathion+phoxim
Cyhalothrin+parathion-methyl+isocarbophos
Lambda-cyhalothrin+chlorpyrifos+Piperonyl butoxide
Diflubenzuron+Lambda-cyhalothrin
Diflubenzuron+Lambda-cyhalothrin
Lambda-cyhalothrin+Hexaflumuron
Propoxur+Lambda-cyhalothrin
Lambda-cyhalothrin+Pirimiphos-methyl
Pymetrozine+Lambda-cyhalothrin
Clothianidin+Lambda-Cyhalothrin
Lambda-cyhalothrin+Lufenuron
Lambda-cyhalothrin+Dinotefuran
Physical Properties
Molecular weight:449.9; Physical form:Yellow to brown viscous oil ( tech.). Density:1.25 (25 °C); Composition:Tech. grade cyhalothrin has purity 90% m/m, of which 95% is cis- isomers. Flash point:204 °C ( tech., Pensky-Martens closed cup); Vapour pressure:0.001 mPa (20 °C, est.); Partition coefficient(n-octanol and water):logP = 6.9 (20 °C); pKa:>9 (hydrolysis prevents measurement); Solubility:In water 0.005 mg/l ( pH 6.5, 20 °C). In acetone, dichloromethane, methanol, diethyl ether, ethyl acetate, hexane, toluene, all >500 g/l (20 °C).; Stability:Stable to decomposition and cis/trans isomerisation for at least 4 years in the dark at 50 °C. Stable to light; loss on storage in the light is <10% in 20 months. Decomposes at 275 °C. Slowly hydrolysed by water in sunlight.
Toxicology
Oral:Acute oral LD50 for male rats 166, female rats 114, guinea pigs >5000, rabbits >1000 mg/kg. Percutaneous:Acute percutaneous LD50 for male rats 1000-2500, female rats 200-2500, rabbits >2500 mg/kg. Moderate eye irritant; not a skin irritant (rabbits). Moderate skin sensitiser (guinea pigs). Inhalation: LC50 (4 h) for rats >0.086 mg/l.
Environmental Profile
Ecotoxicology: 
Birds:Acute oral LD50 for mallard ducks >5000 mg/kg.Daphnia: LC50 (48 h) 0.38 μg/l.Fish: LC50 (96 h) for rainbow trout 0.00054 mg/l. 
Environmental fate: 
Animals:In rats, following oral administration, cyhalothrin is rapidly eliminated in urine and faeces. The ester group is hydrolysed, both moieties forming polar conjugates.Soil:In soil, DT50 c. 4-12 weeks. Leaching of cyhalothrin and its degradation products through a range of soil types is negligible.
Transport Information
Hazard Class:II (Moderately hazardous)

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