Acetochlor

Common name: acetochlor; acétochlore
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]

PHYSICAL CHEMISTRY
Composition: Tech. is 94% 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. KOW: logP = 4.14; Henry: 3.83x10-1 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.