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Common NamePendimethalin
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中文通用名二甲戊灵
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IUPACN-(1-ethylpropyl)-2,6-dinitro-3,4-xylidine
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CASN-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine
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CAS No.40487-42-1
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Molecular FormulaC13H19N3O4
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Molecular Structure
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Category
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ActivityHerbicide
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PremixPyroxsulam+pendimethalin
Pyrazosulfuron-ethyl+Pendimethalin+Oxadiazon
Pyrazosulfuron-ethyl+Oxyfluorfen+Pendimethalin
Pyrazosulfuron-ethyl+Clomazone+Pendimethalin
Pendimethalin+picolinafen
Pendimethalin+Metolachlor
Pendimethalin+Flumetralin
Oxadiazon+Oxyfluorfen+Pendimethalin
Flumioxazin+Pendimethalin
Bensulfuron-methyl+pendimethalin
Emulsifiable concentrate.
Premix Parters: S-bioallethrin; S-bioallethrin piperonyl butoxide; dichlofluanid tebuconazole; fenitrothion; pheromone; piperonyl butoxide; piperonyl butoxide tetramethrin; pyrethrins; tebuconazole; tetramethrin;
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Physical PropertiesMolecular weight:281.3; Physical form:Orange-yellow crystals. Density:1.19 at 25 °C; Composition:Tech. grade is 90% pure. Melting point:54-58 °C; Vapour pressure:4.0 mPa (25 °C); Partition coefficient(n-octanol and water):logP = 5.18; Solubility:In water 0.3 mg/l (20 °C). In acetone 700, xylene 628, corn oil 148, heptane 138, isopropanol 77 (all in g/l, 26 °C). Readily soluble in benzene, toluene, chloroform and dichloromethane. Slightly soluble in petroleum ether and petrol.; Stability:Very stable in storage; store above 5 °C and below 130 °C. Stable to acids and alkalis. Slowly decomposed by light.
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ToxicologyOral:Acute oral LD50 for male rats 1250, female rats 1050, male mice 1620, female mice 1340, rabbits >5000, beagle dogs >5000 mg/ kg. Percutaneous:Acute percutaneous LD50 for rabbits >5000 mg/kg. Non-irritating to skin and eyes (rabbits). Phytotoxicity:Injury to maize may occur if used as a pre-plant, soil-incorporated treatment. ADI:0.02 mg/ kg b.w.
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Environmental ProfileEcotoxicology:
Bees: LD50 (topical) >50µg/bee.Birds:Dietary LC50 (8 d) for bobwhite quail 4187, mallard ducks 10 388 mg/ kg diet.Fish: LC50 (96 h) for rainbow trout 0.14, bluegill sunfish 0.2, channel catfish 0.42 mg/l.
Environmental fate:
Animals:In rats, the major metabolic routes for pendimethalin involve hydroxylation of the 4-methyl and N-1-ethyl groups, oxidation of these alkyl groups to carboxylic acids, nitro-reduction, cyclisation and conjugation (J. Zulian, J. Agric. Food CheSoil:In soil, the 4-methyl group on the benzene ring is oxidised to the carboxylic acid via the alcohol; the amino nitrogen is also oxidised. DT50 in soil is 3-4 mo (A. Walker & W. Bond, Pestic. Sci., 1977, Plant:In plants, the 4-methyl group on the benzene ring is oxidised to the carboxylic acid via the alcohol. The amino nitrogen is also oxidised. WATER SOLUBILITY: 0.275 ppm at 25°C HAZARDS: Fish: Toxic -
Transport InformationSignal Word:CAUTION; Hazard Class:III(Slightly hazardous)
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Pendimethalin Pendimethalin Picolinafen
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