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Chemical Identification
Common Name
Fenpropidin
中文通用名
苯锈啶
IUPAC
1-[(RS)-3-(4-tert-butylphenyl)-2-methylpropyl]piperidine
CAS
1-[3-[4-(1,1-dimethylethyl)phenyl]-2-methylpropyl]piperidine
CAS No.
67306-00-7
Molecular Formula
C19H31N
Molecular Structure
Category
Activity
Fungicide
Premix
Fenpropidin+propiconazole
Emulsifiable concentrate. 
Premix Parters: bensulfuron-methyl; propanil;
Physical Properties
Molecular weight:273.5; Physical form:Pale yellow, odourless, slightly viscous liquid. Density:0.91 (20 °C); Flash point:156 °C; Vapour pressure:17 mPa (25 °C); Henry constant:c. 10.7 Pa m3 mol-1 (25 °C, calc.); value based on calculated solubility of neutral fenpropidin at pH 7 and 9; Partition coefficient(n-octanol and water):logP = 2.59 ( pH 7, 22 °C); pKa:10.1 ( est.), strong base; Solubility:In water 530 ( pH 7), 6.2 ( pH 9) (in g/m3, 25 °C). Completely miscible with acetone, ethanol, toluene, n-octanol, n-hexane (25 °C).; Stability:Stable at room temperature in closed container for at least 3 years. Stable to u.v. light when in aqueous solution. Stable to hydrolysis at 80 °C at pH 4, 7 and 10.;
Toxicology
Oral:Acute oral LD50 for rats >1447 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >4000 mg/kg. Skin and eye irritant (rabbits). Not a skin sensitiser (guinea pigs). Inhalation: LC50 (4 h) for rats 1220 mg/m3 air. ADI:( JMPR) 0.03 mg/ kg b.w. [1993].
Environmental Profile
Ecotoxicology: 
Algae: EbC50 (96 h) for Microcystis aeruginosa 4.4, Scenedesmus subspicatus 0.0057, Navicula pelliculosa 0.0025 mg/l.Bees:Relatively non-toxic to bees; LD50 (48 h) (oral) >0.01 mg/bee; (contact) 0.046 mg/bee.Birds:Acute oral LD50 for mallard ducks 1900, pheasants 370 mg/ kg.Daphnia: LC50 (48 h) 0.5 mg/l.Fish: LC50 (96 h) for rainbow trout 2.6, mirror carp 3.6, bluegill sunfish 1.9 mg/l.Worms: LC50 (14 d) for earthworms >1000 mg/ kg soil.Other beneficial spp.:Moderately harmful to the predatory mite Phytoseiulus persimilis ( IOBC). 

Environmental fate: 
Animals:In rats, following oral administration, fenpropidin is rapidly absorbed, distributed, metabolised and excreted in the urine and faeces. No bioretention potential.Soil:Strongly adsorbed, Kd 43.5 (sandy loam) - 117.1 (sandy clay loam), and extensively degraded, DT50 58 (loam) - 95 (sandy loam), in soil. Fenpropidin and its metabolites have little or no tendency to lePlant:Relatively rapid and extensive degradation. In wheat, the principal metabolic pathway involves hydroxylation of the piperidine ring and oxidation of the tertiary butyl group. DT50 in wheat and barley plants c. 4-11 d.
Transport Information
Signal Word:CAUTION; Hazard Class:II(Moderately hazardous)

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