Chemical: 乐果
Use category: Insecticides > Organophosphorus insecticides Acaricides / Miticides > Organophosphorus acaricides Nematicides > Organophosphorus nematicides
Content & formulation: 98%,40%EC
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  • Chemistry Identity
  • Technical sheet
  • Application

CAS No.】: 60-51-5

CAS】: O,O-dimethyl S-[2-(methylamino)-2-oxoethyl] phosphorodithioate

Molecular Formula】: C5H12NO3PS2


Molecular weight】:229.3.

Physical form】:Colourless crystals, mercaptan odor,( tech., white to greyish crystals).

Density】:1.277 at 65 °C; Composition:Tech. grade is 95% pure.

Melting point】:49 °C; ( tech., 43-45 °C);

Vapour pressure】:0.25 mPa (25 °C);

Henry constant】:1.2×10-6 Pa m3 mol-1;

Partition coefficient(n-octanol and water)】:logP = 0.704;

Solubility】:In water 23.3 ( pH 5), 23.8 ( pH 7), 25.0 ( pH 9) (all in g/l, 20 °C).

Readily soluble in most organic solvents, e.g. in alcohols, ketones, benzene, toluene, chloroform, dichloromethane >300, carbon tetrachl.

Stability】: Relatively stable in aqueous media at pH 2-7. Hydrolysed in alkaline solutions; DT50 12 d ( pH 9). Decomposes on heating, forming the O,S-dimethyl analogue. Highly soluble in chloroform, methylene chloride, benzene, toluene, alcohols, esters, ketones. Slightly in xylene, carbon tetrachloride, aliphatic hydrocarbons.

Biochemistry Cholinesterase inhibitor. Mode of action Systemic insecticide and acaricide with contact and stomach action. Uses Control of a wide range of Acari, Aphididae, Aleyrodidae, Coccidae, Coleoptera, Collembola, Diptera, Lepidoptera, Pseudococcidae and Thysanoptera in cereals, citrus, coffee, cotton, fruit, grapes, olives, pastures, beetroot, potatoes, pulses, tea, tobacco, and vegetables. Also used for control of flies in animal houses. Phytotoxicity Non-phytotoxic when used as directed, except to some varieties of lemon, peach, fig, olive, walnut, hop, tomato, bean, cotton, and pine. Russetting is possible with Red Delicious and Golden Delicious apples, and with some ornamentals. Formulation types EC; GR; UL; WP; Aerosol. Compatibility Incompatible with alkaline materials and with sulfur-based formulations. Selected tradenames: 'Perfekthion' (BASF); 'Rogor' (Isagro); 'Afidox' (Lucava); 'Cekutoate' (Cequisa); 'Danadim' (Cheminova); 'Diadhan' (Dhanuka); 'Dicentra' (Sanonda); 'Dimezyl' (Agriphar); 'Efdacon' (Efthymiadis); 'Hilthioate' (Hindustan); 'Robgor' (Ramcides); 'Romethoate' (Rotam); 'Tara 909' (Shaw Wallace); 'Teeka' (Nagarjuna Agrichem)


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