Molecular Formula: C₁₄H₂₀ClNO₂
Molecular Weight: 269.77
MP: <0^°C
Density: 1.119 g/cm³  
Flash Point: 190.5 °C 
Boiling Point: 391.5 °C at 760 mmHg 
storage temp.:  0-6°C
Vapour Pressure: 2.46E-06 mmHg at 25°C 
Index of Refraction: 1.538 
Appearance：Amber to purple transparent liquid
Solubility: 23 mg/L at 25°C in water. Acetochlor (CAS NO.34256-82-1) is soluble in alcohol, acetone, toluene and tetrachloride.
Stability：Acetochlor (CAS NO.34256-82-1) is stable under normal temperatures and pressures and is stable in neutral, weakly acidic and weakly alkaline media.

Acetochlor (CAS NO.34256-82-1) is a selective herbicide used for control of most annual grasses and certain broadleaf weeds. The effect in soil can persist for more than 8 weeks. It can be used on peanuts, corn, soybeans, maize, cotton, sunflower, vineyards, onion, green peas, potatoes etc.. Acetochlor (CAS NO.34256-82-1) is applied preemergence, preplant incorporated and is compatible with most other pesticides and fluid fertilizers when used at recommended rates.

First, 2,6-methylethyl aniline, monochloroacetic acid react with trichloride to form 6-methylethyl-chloroacetyloy for aniline; then in the presence of hydrochloric acid, POM reacts with ethanol to form chloromethyl ethyl ether by etherification. Finally, Acetochlor (34256-82-1) is synthesized from 6-methylethyl-chloroacetyloy for aniline and chloromethyl ethyl ether by condensation.

Toxicity

Hazard Codes: N,Xn (Harmful; Dangerous for the environment)
Risk Statements: 20-37/38-43-50/53 (Harmful by inhalation; Irritating to respiratory system and skin; May cause sensitization by skin contact; Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment)
Safety Statements: 2-36/37-60-61 (Keep out of the reach of children; Wear suitable protective clothing and gloves; This material and/or its container must be disposed of as hazardous waste; Avoid release to the environment)
RIDADR: UN3082 9/PG 3
RTECS: AB5457000
Moderately toxic by ingestion. When heated to decomposition it emits toxic vapors of NO_x and Cl⁻.

Content of Acetochlor (w/w): ≥95%
Water Content (w/w): ≤0.4%
Acidity (Calculated as H2SO4) (w/w): ≤0.1%

 Acetochlor is a herbicide developed by Monsanto Company and Zeneca. It is a member of the class of herbicides known as chloroacetanilides. Its mode of action is elongase inhibition, and inhibition of geranylgeranyl pyrophosphate (GGPP) cyclisation enzymes, part of the gibberellin pathway. It carries high risks of environmental contamination.

Physical Properties