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Chemical Identification
Common Name
Thiofanox
中文通用名
久效威
IUPAC
(EZ)-3,3-dimethyl-1-methylthiobutanone O-methylcarbamoyloxime
or
(EZ)-1-(2,2-dimethyl-1-methylthiomethylpropylideneaminooxy)-N-methylformamide
CAS
3,3-dimethyl-1-(methylthio)-2-butanone O-[(methylamino)carbonyl]oxime
CAS No.
39196-18-4
Molecular Formula
C9H18N2O2S
Molecular Structure
Physical Properties
Molecular weight:218.3; Physical form:Colourless solid, with a pungent odour. Melting point:56.5-57.5 °C; Vapour pressure:22.6 mPa (25 °C); Solubility:In water 5.2 g/l (22 °C). Readily soluble in chlorinated and aromatic hydrocarbons, ketones and non-polar solvents. Slightly soluble in aliphatic hydrocarbons.; Stability:Stable to heat under normal storage conditions. Relatively stable to hydrolysis at pH 5-9 (under 30 °C). Decomposed by strong acids and alkalis.;
Toxicology
Oral:Acute oral LD50 for albino rats 8.5 mg/kg. Percutaneous:Acute percutaneous LD50 for albino rabbits 39 mg/kg. ADI:( JMPR) 0.03 mg/kg b.w. [2000].
Environmental Profile
Ecotoxicology: 
Bees:Not toxic to bees when used as directed.Birds:Acute oral LD50 for mallard ducks 109, bobwhite quail 43 mg/kg.Fish: LC50 (96 h) for rainbow trout 0.13, bluegill sunfish 0.33 mg/l. 

Environmental fate:
 Animals:Metabolism of carbamate insecticides is reviewed (M. Cool & C. K. Jankowski in "Insecticides").Soil:In soil, the methylthio group is rapidly oxidised to the sulfoxide and further, to the sulfone. Further degradation occurs to water-soluble metabolites.Plant:Metabolism in plants is the same as in soil. The duration of activity following absorption through the roots is at least 8 weeks.
Transport Information
Signal Word:DANGER; Hazard Class:Ib(Highly hazardous)

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