DIMETHACHLOR

Description

Dimethachlor is a pre-emergence herbicide. It is highly soluble in water and has a low volatility. It is not expected to be persistent in soil systems but may be persistent in aquatic systems depending on local conditions. Based on its physico-chemical properties, dimethachlor is not expected to leach to groundwater. It is highly toxic to algae, moderately toxic to other aquatic species, birds and earthworms, and a low toxicity to honeybees. Dimethachlor has a moderate toxicity to mammals if ingested and is an irritant.

Chemical Properties

Dimethenamid pure product is white scaly crystal, melting point 137.5~139°C. It is easily soluble in organic solvents such as acetone, tetrahydroxylenol, ethanol and so on. It is easily soluble in organic solvents such as acetone, tetrahydroxysorbate, dimethylsorbate, etc. It is soluble in methanol, ethanol, insoluble in n-hexane, petroleum ether, almost insoluble in water. The original powder is light brown solid, the content of the active ingredient does not change much when stored at room temperature. It is more stable in acid, easy to decompose in alkali and sunlight irradiation, and should be stored in a shaded and cool place.

Uses

Dimethachlor is a pesticide.

Definition

ChEBI: An organochlorine compound that is 2-chloroacetamide substituted by a 2-methoxyethyl and a 2,6-dimethylphenyl group at the nitrogen atom.

Production Methods

The commercial production of dimethachlor starts with a reaction of 2,6-dimethylaniline with 2-methoxyethylamine, followed by acylation with chloroacetyl chloride in an organic solvent under controlled temperature and pH conditions to optimise yield and minimize byproducts. The crude dimethachlor is purified via filtration and recrystallisation to achieve high purity and formulated.

Mechanism of action

Selective, absorbed by new shoots of seedlings and roots. Inhibition of very long chain fatty acids (VLCFA, inhibition of cell division)

Pesticide Type

Herbicide