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Chemical Identification
Common Name
Butylate
中文通用名
丁草敌
IUPAC
S-ethyl diisobutyl(thiocarbamate)
CAS
S-ethyl bis(2-methylpropyl)carbamothioate
CAS No.
2008-41-5
Molecular Formula
C11H23NOS
Molecular Structure
Physical Properties
Molecular weight:217.4; Physical form:Colourless liquid with an aromatic odour; ( tech., amber liquid). Density:0.9402 (25 °C); Flash point:115 °C; Vapour pressure:1.73 × 103 mPa (25 °C); Henry constant:×1.04 × 101 Pa m3 mol-1 (20 °C, calc.); Partition coefficient(n-octanol and water):logP = 4.1 (25 °C); Solubility:In water 36 mg/l (20 °C). Miscible with common organic solvents, e.g. acetone, ethanol, xylene, methyl isobutyl ketone, kerosene.; Stability:Thermally stable up to 200 °C. Hydrolysed by strong acids and alkalis, and in aqueous solution in sunlight.;
Toxicology
Oral:Acute oral LD50 for rats >3500 mg/kg. Percutaneous:Acute percutaneous LD50 for rabbits >5000 mg/kg. Slight/mild skin irritant; non-irritant to eyes (rabbits). Inhalation: LC50 (4 h) for rats 5.2 mg/l air. ADI:( JMPR) Temporary ADI withdrawn [1984].
Environmental Profile
Ecotoxicology: 
Bees:Not hazardous to bees when used as directed.Birds:Dietary LC50 (7 d) for bobwhite quail 40 000 mg/kg diet.Fish: LC50 (96 h) for rainbow trout 4.2, bluegill sunfish 6.9 mg/l. 

Environmental fate: 
Animals:In mammals, following oral administration, the major metabolite is the N,N-dialkylcarbamoyl conjugate.Soil:In soil, microbial degradation involves hydrolysis to ethylmercaptan, diisobutylamine and CO2. DT50 1.5-10 w. Duration of residual activity in soil is c. 4 mo.Plant:Rapidly metabolised in plants to CO2, diisobutylamine, fatty acids, conjugates of amines and fatty acids, and naturally-occurring plant constituents.
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

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