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