Products

 

ACETOCHLOR

 

Herbicide
HRAC  K3 WSSA  15; chloroacetamide



NOMENCLATURE
Common name acetochlor (BSI, E-ISO, ANSI, WSSA); acétochlore ((m) F-ISO)
IUPAC name 2-chloro-N-ethoxymethyl-6'-ethylaceto-o-toluidide 
Chemical Abstracts name 2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6-methylphenyl)acetamide 
CAS RN [34256-82-1]  EEC no. 251-899-3  Development codes MON 097 (Monsanto)

PHYSICAL CHEMISTRY
Composition Tech. is 92% pure.  Mol. wt. 269.8  M.f. C14H20ClNO2  Form Clear viscous liquid; (tech. is a wine red to yellow or amber oil).  M.p. 10.6 °C  B.p. 172 ºC/5 mmHg  V.p. 400 30 mPa (20 °C)  KOW logP = 4.14  Henry 3.83 × 10-1 Pa m3 mol-1 (calc.)  S.g./density 1.1221 (20 °C)  Solubility In water 223 mg/l (25 ºC). Soluble in diethyl ether, acetone, benzene, chloroform, ethanol, ethyl acetate, and toluene.  Stability Stable for over 2 years at 20 ºC (EC formulation).  F.p. 160 °C (Tag closed cup)

APPLICATIONS
Biochemistry Inhibits cell division by blocking protein synthesis. Maize tolerance of chloroacetamides is due mainly to conjugation with glutathione; P450 metabolism may also be a factor.  Mode of action Selective herbicide, absorbed mainly by the shoots and secondarily by the roots of germinating plants.  Uses Used pre-emergence or pre-plant to control annual grasses, certain annual broad-leaved weeds and yellow nutsedge in maize (at 3 kg/ha), peanuts, soya beans, cotton, potatoes and sugar cane.  Formulation types CS; EC.