Dimethoate is incompatible with alkaline preparations. Dimethoate is slightly corrosive to iron. Dimethoate is incompatible with sulfur based formulations. . Organophosphates are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.
An organophosphate insecticide. It is an anticholinesterase which disables cholinesterase, an enzyme essential for central nervous system function. Neurotoxic in humans.
insecticide, cholinesterase inhibitor
Systemic and contact insecticide.
Very toxic; the probable oral lethal dose in humans is between 50-500 mg/kg, or between 1 teaspoon and 1 ounce for a 70 kg (150 lb.) person. Dimethoate is a cholinesterase inhibitor, meaning it affects the central nervous system. Death is due to respiratory arrest arising from failure of respiratory center, paralysis of respiratory muscles, intense bronchoconstriction or all three.
Engenheiro, E. L., et al. "Influence of dimethoate on acetylcholinesterase activity and locomotor function in terrestrial isopods." Environmental Toxicology & Chemistry 24.3(2005):603.
John, Susan, et al. "Protective effect of vitamin E in dimethoate and malathion induced oxidative stress in rat erythrocytes." The Journal of nutritional biochemistry 12.9 (2001): 500-504.
Sharma, Yukti, et al. "Dimethoate-induced effects on antioxidant status of liver and brain of rats following subchronic exposure." Toxicology 215.3 (2005): 173-181.
ChEBI: A monocarboxylic acid amide that is N-methylacetamide in which one of the hydrogens of the methyl group attached to the carbonyl moiety is replaced by a (dimethoxyphosphorothioyl)sulfanediyl group.
Dimethoate is a grey-white crystalline solid at room temperature. It is sparingly soluble in water, soluble in methanol and cyclohexane, but very soluble in chloroform and benzene. It has been classified by the U.S. EPA under GUP. Dimethoate is used extensively for the control of crop pests such as mites, aphids, thrips, plant hoppers, white-flies, and a wide range of other insects that damage, crops, fruits, vegetables, and ornamental plants. Dimethoate is also used for the control of cattle grubs that infect livestock. Thermal decomposition of dimethoate is highly hazardous due to the release of fumes of dimethylsulphide, methyl mercaptan, carbon monoxide, carbon dioxide, phosphorus pentoxide, and nitrogen oxides.
This organophosphorus compound is used as a contact
and systemic insecticide and acaricide. It induced an
erythema-multiform-like contact dermatitis in a ware-
houseman in an agricultural consortium.
CHIMIGOR 40®; CYGON 400®[C]; DEFEND®;
DAPHENE®; DANADIM®; DANADIM® PROGRESS;
DE-FEND®; DEMOS NF®; DEVIGON®; DICAP®;
DIMATE 267®; DIMET®; DIMETHOATE 40;
DIMETHOPGAN®; FERKETHION®; FOSTION
MM®; KENLOGO®; NUGOR®; PERFEKTION®;
ROGODAN®; ROGODIAL®; ROGOR®; ROXION®;
A white crystalline solid, with a camphor-like odor, white to grayish crystals for technical product. Dimethoate is a contact and systemic organophosphate insecticide effective against a broad range of insects and mites when applied on a wide range of crops. Dimethoate has not been produced in the U.S. since 1982.
Insecticide, Miticide: Dimethoate is used to kill mites and insects systemically and on contact. It is used against a wide range of
insects, including aphids, thrips, planthoppers, and whiteflies on ornamental plants, alfalfa, apples, corn, cotton,
grapefruit, grapes, lemons, melons, oranges, pears, pecans, safflower, sorghum, soybeans, tangerines, tobacco,
tomatoes, watermelons, wheat, and other vegetables. It is
also used as a residual wall spray in farm buildings for
house flies. Dimethoate has been administered to livestock
for control of botflies. Dimethoate is available in aerosol
spray, dust, emulsifiable concentrate, and ULV concentrate
Air & Water Reactions
Dimethoate is stable in aqueous solution but is hydrolyzed by aqueous alkali.
As with other organophosphorus pesticides, container may explode in heat of fire. The temperature of storage should not exceed 70-80F. Keep away from sources of heat, flames, or spark-generating equipment. Unstable in alkaline solution. Hydrolyzed by aqueous alkali. Stable in aqueous solutions. The compound is stable for 2 years under environmental conditions if stored in undamaged, original containers.