Molecular Formula: C15-H22-Cl-N-O2, Molecular Weight: 283.8, Classification: Herbicide, Synonym: 2-Chloro-N-(2-ethyl-6-methylphenyl)-N-(-2-methoxy-1-methylethyl)acetamide. Metolachlor is a commonly used chloroacetamide preemergent pesticide, which can be used for weed control management in a variety of food crops. It can undergo degradation in soil via microbial transformation reactions and hydrolytic reactions.