563-12-2 Ethion

Ethion (Cethion, Dhanumit, Ethiol, Royethion, Rodocide, Tafethion) 

IUPAC name O, O, O, O - tetraethyl S,S-methylene bis (phosphorodithioate) Molecular formula C9H22O4P2S4 Toxicity class USEPA II WHO II 

Uses Technical ethion is an odorless amber liquid. Ethion is used to kill aphids, mites, scales, thrips, leafhoppers, maggots, and foliar feeding larvae. It may be used on a wide variety of foods, fibers, and ornamental crops, including greenhouse crops, lawns, and turf. Ethion often is used on citrus and apples. It is mixed with oil and sprayed on dormant trees to kill eggs and scales. Ethion also may be used on cattle. It is available in dust, emulsifiable concentrate, emulsifiable solution, granular, and wettable powder formulations.28 

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Ethanol, 2-methoxy-, 62 Ethanolamines, 62 Ethmylestradiol, 62 Ethion, 62 Ethoprophos, 63 2-Ethoxyethanol, 63 2-Ethoxyethyl acetate, 63 Ethyl acetates, 63 Ethyl acetylene, 63... 

Fig. 8 Composition of the identified patterns of contamination (loadings) in SW of the Ebro River in summer and fall campaigns from 2004 to 2006. Variables identification 1, diazinon 2, dimethoate 3, ethion 4, tributylphosphate 5, atrazine 6, desethylatrazine 7, simazine 8, terbutryn 9, terbuthylazine 10, propanil 11, alachlor 12, metolachlor 13, octylphenol 14, nonylphenol...

Ethion [563-12-2] Daphnia magna EC50 (48-h) -4.25 Johnson and Finley, 1980... 

Soil The half-lives of ethion in an organic soil varied from 16 to 49 wk however, repeated applications each spring resulted in increased residues of unreacted ethion (Chapman et al., 1984). 

Photolytic. Ethion in hexane did not exhibit absorption at UV wavelengths >260 nm (Gore et al, 1971). 

Sherman, J.C., Nevin, T.A., and Easater, J.A. Hydrogen sulfide production from ethion by bacteria in lagoonal sediments. Bull. Environ. Contam. Toxicol, 12(3) 359-365, 1974. 

The Committee examined five organophosphate pesticides (acephate, chlorpyrifos, dimethoate, disulfoton, and ethion), which are all cholinesterase inhibitors and may be present as residues in fruits and vegetables. Chlorpyrifos was used as the index compound. The TEF was defined as the ratio of the NOAEL or LOAEL for each pesticide to the NOAEL or LOAEL for chlorpyrifos. TEFs based on LOAELs were used when a NOAEL could mot be established for two of the compounds. 

The widespread application and development of dithiophosphate esters have far outdistanced efforts to provide methods for the analysis of such materials. For ETHION (2) Graham has shown that it is possible to analyze for the ester by hydrolyzing it in the presence of copper (II) ion and then determining the amount of the copper complex qpec-trophotometrically. A yellow copper complex similarly formed with MALATHION serves... 

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