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Physical Properties
Molecular weight:251.4; Physical form:Colourless liquid; ( tech. is a light yellow liquid, with a slightly sweet odour). Density:1.042; Composition:Tech. material is 95% pure. Flash point:132 °C (closed cup); Vapour pressure:6.9 mPa (25 °C); Henry constant:1 × 10-1 Pa m3 mol-1 (20 °C, calc.); Partition coefficient(n-octanol and water):logP = 4.65 (25 °C); Solubility:In water 13.2 mg/l (20 °C). Miscible with acetone, chlorobenzene, ethanol, xylene, ethyl acetate and kerosene.; Stability:Stable for at least 2 months at 52 °C. Hydrolysis DT50 >159 d (pH 7, 25 °C).
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Toxicology
Oral:Acute oral LD50 for male rats 1820, female rats 1958 mg/ kg. Percutaneous:Acute percutaneous LD50 for rabbits >2000 mg/kg. Slight/mild irritation to skin and eyes (rabbits). Not a skin sensitiser (guinea pigs). Inhalation: LC50 (4 h) for rats >4.7 mg/l. Phytotoxicity:Post-emergence applications may cause some injury to winter barley. ADI:0.08 mg/ kg.
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Environmental Profile
Ecotoxicology:
Algae: EC50 (96 h) for Scenedesmus subspicatus 0.11 mg/l.Bees: LD50 (48 h) (contact) >79 µg/bee; (oral) 103 µg/bee.Birds:Acute oral LD50 for bobwhite quail >2250 mg/kg. LC50 for mallard ducks >5620 mg/ kg; NOEC for mallard ducks >1000 Daphnia: LC50 (48 h) 1.3 mg/l.Fish: LC50 (96 h) for bluegill sunfish 4.2, rainbow trout 1.7 mg/l.Worms: LC50 144 mg/ kg.Other beneficial spp.:Harmless to Pterostichus melanarius and Pardosa sp.
Environmental fate:
Soil:In soil, undergoes microbial decomposition, DT50 12-49 d (21.5 °C, aerobic).Plant:In plants, hydrolytic decomposition occurs and the thiol group is split off, giving mercaptan, dipropylamine and CO2. WATER SOLUBILITY: 13.2 mg/l at 20°C HAZARDS: Fish: LC50 (96 h) 4.2 mg/l (bluegill sunfish),1.7 mg/l (rainbow trout). Daphnia: EC50 (48 h) 1.3 mg/l. Bird: Dietary (8 day): 3160 mg/kg (mallard duck), 1780 mg/kg (bobwhite quail)
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Transport Information
Hazard Class:II(Moderately hazardous)