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Common Name
Tri-allate
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中文通用名
野麦畏
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IUPAC
S-2,3,3-trichloroallyl diisopropyl(thiocarbamate)
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CAS
S-(2,3,3-trichloro-2-propenyl) bis(1-methylethyl)carbamothioate
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CAS No.
2303-17-5
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Molecular Formula
C10H16Cl3NOS
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Molecular Structure
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Category
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Activity
Herbicide
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Physical Properties
Molecular weight:304.7; Physical form:Dark yellow to brown solid; (>30 °C, clear brown to dark brown liquid). Density:1.273 (25 °C); Composition:Tech. is c. 96% pure. Melting point:29-30 °C; Flash point:>150 °C (closed cup); Vapour pressure:16 mPa (25 °C); Henry constant:1.22 Pa m3 mol-1 (calc.); Partition coefficient(n-octanol and water):logP = 4.6; Solubility:In water 4 mg/l (25 °C). Readily soluble in common organic solvents such as acetone, diethyl ether, ethyl acetate, ethanol, benzene, heptane.; Stability:Stable under normal storage conditions. Hydrolysed by strong acids and alkalis. Stable to light. Decomposition temperature >200 °C.;
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Toxicology
Oral:Acute oral LD50 for rats 1100 mg/kg. Percutaneous:Acute percutaneous LD50 for rabbits 8200 mg/kg. Slightly irritating to skin and eyes (rabbits). Not a skin sensitiser. Inhalation:Inhalation of saturated air (5.3 mg/l) for 12 h had no harmful effect on rats. Phytotoxicity:Oats are susceptible. ADI:( JMPR) 0.05 mg/kg b.w. [1989].
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Environmental Profile
Ecotoxicology:
Algae: EC50 (96 h) for Selenastrum capricornutum 0.12 mg/l.Bees:Non-toxic to bees.Birds:Acute oral LD50 for bobwhite quail >2251 mg/kg. Dietary LC50 (8 d) for mallard ducks and bobwhite quail >5620 mg/kg diet.Daphnia: LC50 (48 h) 0.43 mg/l.Fish: LC50 (96 h) for rainbow trout 1.2, bluegill sunfish 1.3 mg/l.Other beneficial spp.:No adverse effect on soil microflora.
Environmental fate:
Animals:Tri-allate metabolism in rats proceeds via three pathways: S-oxidation to sulfur acids, S-oxidation/reduction to thiol derivatives, and C-oxidation of the 2,3,3-trichloropropenethiol moiety.Soil:Main loss from soil is by microbial action (or by volatilisation, if not incorporated in soil). Metabolism proceeds via hydrolytic cleavage with the formation of dialkylamine, CO2 and mercaptan moieties. The latter is transformed via sulfhydrylPlant:2,3,3-Trichloropropenesulfonic acid is the major detectable crop metabolite.
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Transport Information
Hazard Class:III(Slightly hazardous)