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Chemical Identification
Common Name
Lambda-cyhalothrin
中文通用名
高效氯氟氰菊酯
IUPAC
reaction product comprising equal quantities of (R)-α-cyano-3-phenoxybenzyl (1S,3S)-3-[(Z)-2-chloro-3,3,3-trifluoropropenyl]-2,2-dimethylcyclopropanecarboxylate and (S)-α-cyano-3-phenoxybenzyl (1R,3R)-3-[(Z)-2-chloro-3,3,3-trifluoropropenyl]-2,2-dimethylcyclopropanecarboxylate
or of
(R)-α-cyano-3-phenoxybenzyl (1S)-cis-3-[(Z)-2-chloro-3,3,3-trifluoropropenyl]-2,2-dimethylcyclopropanecarboxylate and (S)-α-cyano-3-phenoxybenzyl (1R)-cis-3-[(Z)-2-chloro-3,3,3-trifluoropropenyl]-2,2-dimethylcyclopropanecarboxylate
CAS
(R)-cyano(3-phenoxyphenyl)methyl (1S,3S)-rel-3-[(1Z)-2-chloro-3,3,3-trifluoro-1-propenyl]-2,2-dimethylcyclopropanecarboxylate
CAS No.
91465-08-6
Molecular Formula
C23H19ClF3NO3
Molecular Structure
Category
Activity
Lambda-cyhalothrin disrupt the normal functioning of the nervous system in an organism .By disrupting the nervous system of insects, lambda-cyhalothrin may cause paralysis or death. Temperature influences insect paralysis and the toxicity of lambda-cyhalothrin.
Formulation
UL = Ultra-low volume liquid
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
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:Colourless solid; ( tech. is a dark brown/green solidified melt). Density:1.33 g/ml (25℃); Composition:Tech. grade is c. 81% pure. Melting point:49.2 ℃; ( tech., 47.5-48.5 ℃); Flash point:185 ℃ ( tech., Pensky-Martens closed cup); Vapour pressure:2 ×10-4 mPa (20℃, est.); 2 ×10-1 mPa (60℃, interpolated); Henry constant:2 × 10-2 Pa m3 mol-1; Partition coefficient(n-octanol and water):logP = 7 (20 ℃); pKa:>9 (hydrolysis prevents measurement); Solubility:In water 0.005 mg/l (20 ℃). In acetone, methanol, toluene, hexane, ethyl acetate >500 g/l.; Stability:Stable to light. Stable on storage for more than 6 months at 15-25 ℃.
Toxicology
Oral:Acute oral LD50 for male rats 79, female rats 56, mice 20 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats 632-696 mg/kg. Mild eye irritant; non-irritant to skin (rabbits). Not a skin sensitiser (guinea pigs). Inhalation: LC50 (4 h) 0.06 mg/l air (total particulate). ADI:( JECFA) 0.002 mg/ kg b.w. (temporary) [2000]; ( JMPR) 0.02 mg/ kg b.w. [1984].
Environmental Profile
Ecotoxicology: 
Algae: ErC50 (96 h) for Selenastrum capricornutum >1000 μg/l.Bees: LD50 (oral) 38 ng/bee; (contact) 909 ng/bee.Birds:Acute oral LD50 for mallard ducks >3950 mg/kg. Dietary LC50 for quail >5300 mg/kg. No accumulation of residues in eggs or tissues.Daphnia: EC50 (48 h) 0.36 μg/l.Fish: LC50 (96 h) for bluegill sunfish 0.21, rainbow trout 0.36 μg/l.Worms: LC50 for Eisenia foetida >1000 mg/ kg soil.Other aquatic spp.:Intrinsic toxicity to aquatic organisms is greatly reduced by rapid loss from the water by adsorption and degradation.Other beneficial spp.:Toxic to some non-target arthropods. Effects under field conditions reduced, with rapid recovery. 

Environmental fate: 
Animals:In rats, following oral administration, rapidly eliminated in urine and faeces. The ester group is hydrolysed, both moieties forming polar conjugates.Soil:Rapidly degraded in soil; DT50 for microbial degradation 23-82 d, for field soil 6-40 d. Strongly adsorbed to soil and sediment organic matter, Koc 330 000. Negligible potential for leaching of lambdaPlant:For details of metabolism of lambda-cyhalothrin in cotton and soya bean leaves, see D. A. French & J. P. Leahey, Proc. Br. Crop Prot. Conf. - Pests Dis., 1990, 3, 1029-1034.
Transport Information
Signal Word:DANGER; Hazard Class:Ib(Highly hazardous)

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