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Chemical Identification
Common Name
Thiram
中文通用名
福美双
IUPAC
tetramethylthiuram disulfide
or
bis(dimethylthiocarbamoyl) disulfide
CAS
tetramethylthioperoxydicarbonic diamide ([[(CH3)2N]C(S)]2S2)
CAS No.
137-26-8
Molecular Formula
C6H12N2S4
Molecular Structure
Category
Activity
Fungicide
Premix
Imidacloprid+thiram
Imidacloprid+carbendazim+thiram
Imidacloprid+thiram+carboxin
Imidacloprid+thiram+tebuconazole
Chlorothalonil+carbendazim+thiram
Chlorothalonil+thiram
Chlorothalonil+thiram+ziram
Thiophanate-methyl+thiram
Amicarthiazol+thiram
Thiram+quintozene
Amicarthiazol+thiram+quintozene
Thiram+ziram
Thiram+ziram+urbacide
Carbendazim+thiram
Carboxin+thiram
Thiram+metalaxyl
Hymexazol+thiram
Fenaminosulf+Thiram
Iprodione+Thiram
Carbendazim+Thiram+Emamectin benzoate
Abamectin+Carbendazim+Thiram
Thiamethoxam+Thiram+Carboxin
Thiamethoxam+Thiram+Carboxin
Epoxiconazole+Thiram
Propiconazol+Thiram
Pyraclostrobin+Thiram
Prochloraz+Thiram
Amicarthiazol+Thiram+Acephate
Dust, flowable, wettable powder, water dispersible granules, and water suspension. Premix Parters: tebuconazole;
Physical Properties
Molecular weight:240.4; Physical form:Colourless crystals. Density:1.29 (20 °C); Melting point:155-156 °C; Vapour pressure:2.3 mPa (25 °C); Partition coefficient(n-octanol and water):logP = 1.73; Solubility:In water 18 mg/l (room temperature). In ethanol <10, acetone 80, chloroform 230 (all in g/l, room temperature). In hexane 0.04, dichloromethane 170, toluene 18, isopropanol 0.7 (all in g/l, 20 °C).; Stability:Decomposed in acidic media. Some deterioration on prolonged exposure to heat, air or moisture. DT50 (est.) (22 °C) 128 d (pH 4), 18 d ( pH 7), 9 h ( pH 9).;
Toxicology
Oral:Acute oral LD50 for rats 2600, mice 1500-2000, rabbits 210 mg/kg. Percutaneous:Acute percutaneous LD50 for rabbits >2000 mg/kg. Moderate eye irritant; slight skin irritant. In percutaneous toxicity test in humans, application of the dry powder to the skin produced very slight erythema in Inhalation: LC50 (4 h) for rats 4.42 mg/l air. ADI:( JMPR) 0.08 mg/kg b.w. [1998].
Environmental Profile
Ecotoxicology:
 Bees: LD50 (oral) >2000 µg/bee (80% formulation); (contact) 73.7 µg/bee (75% formulation).Birds:Acute oral LD50 for male ring-necked pheasants 673, mallard ducks >2800, starlings >100, redwing blackbirds >100 mg/kg. LC50 (8 d) for ring-necked pheasants >5000, mallard ducks >500Daphnia: LC50 (48 h) 0.21 mg/l.Fish: LC50 (96 h) for bluegill sunfish 0.0445, rainbow trout 0.128 mg/l.Worms: LC50 (14 d) 540 mg/kg soil. 

Environmental fate:
 Animals:The main metabolites formed are COS and CS2.Soil:DT50 0.5 d (sandy soil, pH 6.7).Plant:The major metabolite in plants is dimethylamine salt of dimethyldithiocarbamic acid; tetramethylthiuram disulfide, tetramethylthiuram monosulfide, tetramethylthiourea, carbon disulfide and sulfur can also be formed. Dimethyldithiocarbamic acid can be pres
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

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