Tri-allate

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Tri-allate

中文通用名

野麦畏

IUPAC

S-2,3,3-trichloroallyl diisopropyl(thiocarbamate)

CAS

S-(2,3,3-trichloro-2-propenyl) bis(1-methylethyl)carbamothioate

CAS No.

2303-17-5

Molecular Formula

C₁₀H₁₆Cl₃NOS

Molecular Structure

General Product Information

Category

Herbicides > Thiocarbamate herbicides
Herbicides > Carbamate herbicides

Activity

Herbicide

Physical & Safety Data

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.;

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].

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.

Transport Information

Hazard Class:III(Slightly hazardous)