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Common NameLenacil
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中文通用名环草定
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IUPAC3-cyclohexyl-1,5,6,7-tetrahydrocyclopentapyrimidine-2,4(3H)-dione
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CAS3-cyclohexyl-6,7-dihydro-1H-cyclopentapyrimidine-2,4(3H,5H)-dione
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CAS No.2164-08-1
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Molecular FormulaC13H18N2O2
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Molecular Structure
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Category
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ActivityHerbicide
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PremixPremix Parters: prometryn; trifluralin;
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Physical PropertiesMolecular weight:234.3g/mol; Physical form:White to tan crystals. Density:1.32; Melting point:315.6-316.8 ℃; Vapour pressure:2 × 10-4 mPa (25 ℃); Henry constant:7.81 × 10-6 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 2.31; pKa:10.3, v. weak acid; Solubility:In water 6 mg/l (25℃). Slightly soluble in most organic solvents, e.g. diethyl ether 0.3, hexane 0.5, benzene 0.7, acetone, chloroform 0.9, xylene, methyl isobutyl ketone 2, ethanol 2.4, cyclohexanone 4, dimethyl sulfoxide 6, dimethylfo; Stability:Stable up to the melting point. Stable in water and in aqueous acids. Decomposed by hot alkalis.
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ToxicologyOral:Acute oral LD50 for rats >11 000 mg/ kg. Percutaneous:Acute percutaneous LD50 for rabbits >5000 mg/ kg; slight eye irritant (rabbits, WP formulation). Inhalation: LC50 >5.2 mg/l.
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Environmental ProfileEcotoxicology:
Bees:Not toxic to bees; LD50 >25 μg/bee. Birds:Acute oral LD50 for Pekin ducks >5620 ppm. Dietary LC50 (8 d) for bobwhite quail 2300 mg/ kg diet.Daphnia: LC50 (48 h) >8.4 mg/l.Fish: LC50 (96 h) for carp 10, minnow >2.0, trout >2.0 mg/l. LC50 (21 d) for trout >2.3 mg/l.Worms: LC50 for earthworms >10 000 mg/ kg.
Environmental fate:
Soil:In soil, complete microbial degradation occurs within 5-6 months. DT50 (25℃) (aerobic) 82-150 d. Kd 0.35-2.8; Koc 75-254. -
Transport InformationSignal Word:CAUTION; Hazard Class:III(Slightly hazardous)
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Jiangsu Luye Agrochemicals Co., Ltd.
Country: China
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