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Chemical Identification
Common Name
Fenvalerate
中文通用名
氰戊菊酯
IUPAC
(RS)-α-cyano-3-phenoxybenzyl (RS)-2-(4-chlorophenyl)-3-methylbutyrate
CAS
cyano(3-phenoxyphenyl)methyl 4-chloro-α-(1-methylethyl)benzeneacetate
CAS No.
51630-58-1
Molecular Formula
Molecular Structure
Category
Activity
It is most commonly used to control insects in food, feed, and cotton products, and for the control of flies and ticks in barns and stables. Fenvalerate does not affect plants, but is active for an extended period of time.
Formulation
SC = Suspension concentrate (=flowable concentrate)
WP = Wettable powder
Premix
Imidacloprid+esfenvalerate
Imidacloprid+fenvalerate
Fenvalerate+dichlorvos
Fenvalerate+dimethoate
Fenvalerate+monocrotophos
Esfenvalerate+abamectin
Abamectin+fenvalerate
Profenofos+fenvalerate
Pyridaphenthion+methomyl+fenvalerate
Pyridaphenthion+fenvalerate
Trichlorfon+fenvalerate
Dichlorvos+fenvalerate+phoxim
Dichlorvos+fenvalerate+omethoate
Carbaryl+fenvalerate
Ne+matrine+fenvalerate
Quinalphos+fenvalerate
Endosulfan+esfenvalerate
Endosulfan+fenvalerate
Malathion+esfenvalerate
Malathion+methomyl+fenvalerate
Malathion+fenvalerate
Malathion+fenvalerate+phoxim
Methomyl+fenvalerate
Methomyl+fenvalerate+phoxim
Fenvalerate+triazophos
Fenvalerate+triadimefon
Fenvalerate+isocarbophos
Fenvalerate+phoxim
Fenvalerate+omethoate
Fenvalerate+isoprocarb
Fenvalerate+rotenone
Esfenvalerate+phoxim
Esfenvalerate+fenitrothion
Fenvalerate+fenitrothion
Propargite+fenvalerate
Emulsifiable concentrate, dust, flowable, granule, wettable powder. 
Premix Parters: chlorsulfuron;
Physical Properties
Molecular weight:419.9; Physical form:Tech. fenvalerate is a viscous yellow or brown liquid, sometimes partly crystalline at room temperature. Density:1.175 (25 °C); Composition:Tech. grade fenvalerate is 92.1% pure. Melting point:39.5-53.7 °C (pure); Flash point:230 °C; Vapour pressure:1.92 × 10-2 mPa (20 °C); Partition coefficient(n-octanol and water):logP = 5.01 (23 °C); Solubility:In water <10 mg/l (25 °C). In n-hexane 53, xylene 200, methanol 84 (all in g/l, 20 °C).; Stability:Stable to heat and moisture. Relatively stable in acidic media, but rapidly hydrolysed in alkaline media.;
Toxicology
Oral:Acute oral LD50 for rats 451 mg/ kg. Percutaneous:Acute percutaneous LD50 for rabbits 1000-3200, rats >5000 mg/kg. Slightly irritating to skin and eyes (rabbits). Inhalation: LC50 for rats >101 mg/m3.
Environmental Profile
Ecotoxicology: 
Bees:Toxic to bees. Contact LD50 0.23 mg/bee.Birds:Acute oral LD50 for domestic fowl >1600, mallard ducks 9932 mg/kg. Dietary LC50 for quail >10 000, mallard ducks 5500 mg/ kg.Fish: LC50 (96 h) for rainbow trout 0.0036 mg/l. 

Environmental fate: 
SOIL PARTICLE ADSORPTION: Field studies indicate residues remain in 0"-4" layer with half-life of 1-2 months. After 183 days, residues were at negligible or undetectable levels. Confined and field rotational crop data show residues likely to occur in root crops at intervals of < 9 months HAZARDS: Fish: LC50 0.42 ppb (96 h) (bluegill). Bird: Oral LD50 9932 mg/kg (mallard). Dietary: LC50 >10,000 ppm (quail); 5500 ppm (mallard)
Transport Information
Signal Word:WARNING; Hazard Class:II(Moderately hazardous)

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