Acetochlor
TRADE OR OTHER NAMES
The active ingredient acetochlor is found in a variety of commercial herbicides. Some trade names for products containing acetochlor include Acenit, Guardian, Harness, Relay, Sacemid, Surpass, Top-Hand, Trophy and Winner. Most formulations come as emulsifiable concentrates.
INTRODUCTION
Acetochlor is used for control of most annual grasses and certain broadleaf weeds and yellow nutsedge. Crops include cabbage, citrus, coffee, corn (all types), cotton, green peas, maize, onion, orchards, peanuts, potatoes, rape, soybeans, sugarbeets, sugarcane, sunflower, and vineyards. Acetochlor is applied preemergence, preplant incorporated and is compatible with most other pesticides and fluid fertilizers when used at recommended rates. Usually 0.3-0.6 inches of rainfall will activate the product if it occurs within 7-10 days
PHYSICAL PROPERTIES AND GUIDELINES
Technical acetochlor is an oily liquid at room temperature, light amber to violet in color. It is considered slightly corrosive to mild steel and should not be used in mild steel tanks or with PVC or rubber hoses or pipes. Although acetochlor is stable under normal temperatures and pressures, thermal decomposition products may include toxic oxides of nitrogen and carbon and toxic and corrosive fumes of chlorides.
Exposure Guidelines:
NOEL: 2.0 mg/kg/day
RfD: 0.02 mg/kg/day
Physical Properties:
CAS #: 34256-82-1
Chemical name: 2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6-methylphenyl)acetamide
Chemical Class/Use: Acetamide compound used as a selective preplant incorporated and preemergence herbicide
Specific gravity: 1.100 at 30 degrees C, 1.136 at 20 degrees C
Solubility in water: 223 ppm in water at 25 degrees C (2, 4, 5); 23 mg/L at 25 degrees C
Solubility in other solvents: Soluble in alcohol, acetone, toluene and tetrachloride
Melting point: less than 0 degrees C
Flashpoint: greater than 100 degrees C (closed cup)
Vapor pressure: 3.4 x 10 to the minus 8 at 25 degrees C