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Products center-->> insecticide >> dimethoate

dimethoate

 

98%, 96%tech, 40%ec,

Insecticide, acaricide

organophosphorus

 

NOMENCLATURE

Common name dimethoate (BSI, E-ISO, (m) F-ISO, ANSI, ESA, JMAF); fosfamid (USSR)

IUPAC name O,O-dimethyl S-methylcarbamoylmethyl phosphorodithioate; 2-dimethoxyphosphinothioylthio-N-methylacetamide 

Chemical Abstracts name O,O-dimethyl S-[2-(methylamino)-2-oxoethyl] phosphorodithioate 

CAS RN [60-51-5]  EEC no. 200-480-3  Development codes EI 12 880 (Cyanamid); L 395 (Montedison); BAS 152J (BASF)  Official codes OMS 94; OMS 111; ENT 24 650 

 

PHYSICAL CHEMISTRY

Composition Tech. grade is 95% pure.  Mol. wt. 229.3  M.f. C5H12NO3PS2  Form Colourless crystals; (tech., white to greyish crystals).  M.p. 49 ºC; (tech., 43-45 ºC)  B.p. 117 ºC/0.1 mmHg  V.p. 0.25 mPa (25 C)  KOW logP = 0.704  Henry 1.2 ´ 10-6 Pa m3 mol-1  S.g./density 1.277 at 65 ºC  Solubility In water 23.3 (pH 5), 23.8 (pH 7), 25.0 (pH 9) (all in g/l, 20 ºC). Readily soluble in most organic solvents, e.g. in alcohols, ketones, benzene, toluene, chloroform, dichloromethane >300, carbon tetrachloride, saturated hydrocarbons, n-octanol >50 (all in g/kg, 20 ºC).  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. 

 

APPLICATIONS

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. 

 

CERTIFICATE OF ANALYS:

product name

dimethoate 98% tc

dimethoate 40% ec

a.i.content

98.2%

40.3%

acidity:

0.1%

0.2%

water

0.2%

0.3%

appearance

 

light-yellow transparent liquid

emulsion stability                     

 

qualified

 

Shenzhen Agroland Chemicals Co.,Ltd.
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