| Chemical Properties | A white crystalline solid. Odorless. Can alsobe commercially available as a clear to dark brown liquidwith a typical solvent odor |
| Uses | 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. RestrictedUse Pesticide (RUP). Diclofop-methyl is a selectivepost-emergence herbicide used to control wild oats andannual 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 andlettuce. |
| 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 weedsin 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 classifiedRUP |
| 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 andLincs. E1 of Alopecurus myosuroides) exhibitmoderately enhanced metabolism of 14C-diclofopmethyl. Diclofop methyl is hydrolyzed to thecorresponding propionic acid which undergoes furtherdegradation to give polar metabolites. The amounts ofthe metabolites depend on the metabolism activity ofthe individual biotypes. In wheat, three isomerichydroxylated metabolites are identified in a majormetabolic pathway after acid hydrolysis of theglucoside conjugates. |
| Shipping | UN3345 Phenoxyacetic acid derivative pesticide,solid, toxic, Hazard Class: 6.1; Labels: 6.1-Poisonousmaterials. UN3348 Phenoxyacetic acid derivative pesticide,liquid, toxic, Hazard Class: 6.1; Labels: 6.1-Poisonousmaterial. UN3077 Environmentally hazardous substances,solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneoushazardous material, Technical Name Required. Note:Commercial product may also be a liquid in a flammablecarrier. |
| Incompatibilities | Incompatible with oxidizers, chloratesnitrates, peroxides, sulfuric acid, caustics, ammonia,aliphatic amines, alkanolamines, isocyanates, alkyleneoxides, and epichlorohydrin. |
| Waste Disposal | In accordance with40CFR165, follow recommendations for the disposal ofpesticides and pesticide containers. Containers must be disposed of properly by following package label directions orby contacting your local or federal environmental controlagency, or by contacting your regional EPA office |
