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Common NamePropanil
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中文通用名敌稗
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IUPAC3′,4′-dichloropropionanilide
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CASN-(3,4-dichlorophenyl)propanamide
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CAS No.709-98-8
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Molecular FormulaC9H9Cl2NO
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Molecular Structure
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Category
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ActivityPropanil is an acetanilide post-emergence herbicide with no residual effect. It is used against numerous grasses and broad-leaved weeds. It is available as emulsifiable concentrates, liquid and dry flowable, low volume, and ultra low volume (ULV) formulations. Mixing with carbamates or organophosphorans compounds is not recommended. The information presented here, unless otherwise noted, pertains to technical propanil.
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CropUserice, potatoes, and wheat
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Weed SpectrumIt is used against numerous grasses and broad-leaved weeds
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FormulationDP = Dustable powder
SL = Soluble concentrate
UL = Ultra-low volume liquid -
PremixPyrazosulfuron-ethyl+propanil
Propanil+Triclopyr
Propanil+Thiobencarb
Propanil+Clomazone
Propanil+Butachlor
Propanil+2,4-D-2-ethylhexyl
Metsulfuron-methyl+propanil
Bensulfuron-methyl+propanil
chlorpropham;
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Physical PropertiesMolecular weight:218.1; Solid, white-gray. Melting point 91.5°C. Molecular weight 218.1. Density:1.41 g/cm3 (22 °C); Melting point:91.5 °C; Vapor pressure 2.6 x 10-7 mbar. Herbax* Tech completely soluble in ketones, alcohols, chlorinated hydrocarbons; moderately soluble in xylene, benzene, and toluene. Riselect* readily soluble in ketones (60% in isophorone at 25°C), alcohols (54% in ethanol at 25°C), ethers, and chlorinated hydrocarbons; moderately soluble in aromatic solvents. Sparingly soluble in aromatic solvents.
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ToxicologyOral:Acute oral LD50 for rats >2500, mice c. 1800 mg/ kg. Percutaneous:Acute percutaneous LD50 (24 h) for rats >5000 mg/kg. Not irritating to skin and eyes (rabbits). Not a skin sensitiser (guinea pigs). Inhalation: LC50 (4 h) for rats >1.25 mg/l air (dust). Phytotoxicity:Phytotoxic to many broad-leaved crops. Normally phytotoxic to crops which have been treated with organophosphate or carbamate insecticides.
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Environmental ProfileEcotoxicology:
Birds:Acute oral LD50 for mallard ducks 375, bobwhite quail 196 mg/kg. Dietary LC50 (5 d) for mallard ducks 5627, bobwhite quail 2861 ppmDaphnia: LC50 (48 h) 4.8 mg/l.Fish: LC50 (48 h) for carp 8-11 mg/l.
Environmental fate:
Animals:The major metabolic pathway for propanil in microsomal incubations was acylamidase hydrolysis to 3,4-dichloroaniline (D. C. McMillan, 1990, 103, 90).Soil:In soil, rapid microbial degradation to the aniline derivative occurs. Duration of activity in warm, moist conditions is only a few days. Degradation products are propionate which is rapidly metabolised to CO2, and 3,4-dichloroaniline which is Plant:In rice, propanil is hydrolysed by an aryl acylamidase to 3,4-dichloroaniline and propionic acid as metabolic intermediates. SOIL PARTICLE ADSORPTION: Moderate WATER SOLUBILITY: Sparingly soluble, 0.13 g/l at 25°C HAZARDS: Fish: LC50 14 ppm (bluegill); 13 ppm (rainbow trout). Bird: Dietary LC50 2861 ppm (bobwhite quail), 5627ppm (mallard); Oral LD50 201 mg/kg (quail) DEGRADATION/METABOLISM: Half-life in soil 1.5 days -
Transport InformationHazard Class:III(Slightly hazardous)
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