Diclofop-methyl

Chemical properties

A white crystalline solid. Odorless. Can also be commercially available as a clear to dark brown liquid with a typical solvent odor

The Uses of Diclofop-methyl

Herbicide.

Definition

ChEBI: Methyl 2-[4-(2,4-dichlorophenoxy)phenoxy]propanoate is a methyl ester resulting from the formal condensation of the carboxylic acid group of 2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic acid with methanol. It is an aromatic ether, a dichlorobenzene, a diether and a methyl ester.

General Description

Colorless crystals. Decomposed by either strong acid or base. Used as a selective herbicide.

Air & Water Reactions

Slightly soluble in water (3 mg/l).

Reactivity Profile

A bridged diphenyl.

Hazard

Moderately toxic by ingestion and skin contact. Low toxicity by inhalation.

Agricultural Uses

Herbicide: Some uses are classified as U.S. Restricted Use Pesticide (RUP). Diclofop-methyl is a selective post-emergence herbicide used to control wild oats and annual grassy weeds in grain and vegetable crops: alfalfa, carrots, celery, box, field and french beans, barley, wheat, brassicas, parsnips, peas, potatoes, rapeseed (canola), soy beans, oilseed rape, onions, sugar beets and lettuce.

Trade name

DICHLORDIPHENPROP®; HOELON®; HOELON® 3EC; HOE-GRASS®; HOEGRASS®; HOE® 23408; ILOXAN®; ILLOXAN®; ONE SHOT®[C]

Potential Exposure

Diclofop-methyl is a chlorophenoxy; aryloxyphenoxypropionate acid selective postemergenceherbicide used to control wild oats and annual grassy weeds in grain and vegetable crops: alfalfa, carrots, celery, box, field and French beans, barley, wheat, brassicas, parsnips, peas, potatoes, rapeseed (canola), soy beans, oilseed rape, onions, sugar beets and lettuce. Some uses are classified RUP

Environmental Fate

Biological. From the first-order biotic and abiotic rate constants of diclofop-methyl in estuarine water and sediment/water systems, the estimated biodegradation half-lives were 0.24–12.4 and 0.11–2.2 days, respectively (Walker et al., 1988).

Metabolic pathway

Two resistant biotypes of black-grass (Peldon A1 and Lincs. E1 of Alopecurus myosuroides) exhibit moderately enhanced metabolism of 14C-diclofop methyl. Diclofop methyl is hydrolyzed to the corresponding propionic acid which undergoes further degradation to give polar metabolites. The amounts of the metabolites depend on the metabolism activity of the individual biotypes. In wheat, three isomeric hydroxylated metabolites are identified in a major metabolic pathway after acid hydrolysis of the glucoside conjugates.

Shipping

UN3345 Phenoxyacetic acid derivative pesticide, solid, toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous materials. UN3348 Phenoxyacetic acid derivative pesticide, liquid, toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous material. UN3077 Environmentally hazardous substances, solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required. Note: Commercial product may also be a liquid in a flammable carrier.

Incompatibilities

Incompatible with oxidizers, chlorates nitrates, peroxides, sulfuric acid, caustics, ammonia, aliphatic amines, alkanolamines, isocyanates, alkylene oxides, and epichlorohydrin.

Waste Disposal

In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Containers must be disposed of properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office