Insecticide Methidathion 40% EC

Insecticide:Methidathion 40% EC Mol. wt. 302.3 M.f. C6H11N2O4PS3 Form Colourless crystals. M.p. 39-40 V.p. 2.5 ?10-1 mPa (20 ) KOW logP = 2.2 (OECD 107) Henry 3.3 ?10-4 Pa m3 mol-1 (calc.) S.g./density 1.51 (20 ) (OECD 109) Solubility In water 200 mg/l (25 ). In ethanol 150, acetone 670, toluene 720, hexane 11, n-octanol 14 (all in g/l, 20 ). Stability Rapidly hydrolysed in alkaline and strongly acidic media; DT50 (25 ) 30 min at pH 13. Relatively stable to hydrolysis in neutral and slightly acidic media. Biochemistry Cholinesterase inhibitor. Mode of action Non-systemic insecticide and acaricide with contact and stomach action. Uses Control of a wide range of sucking and chewing insects (especially scale insects) and spider mites in many crops, e.g. pome fruit, stone fruit, citrus fruit, vines, olives, hops, cotton, potatoes, beet, alfalfa, oilseed rape, maize, sunflowers, safflowers, tobacco, hazels, and some vegetables, at 30-60 g/hl.