Description
Bioresmethrin is a broad spectrum pyrethroid insecticide. It hasd a low aqueous solubility and is moderately volatile. It is not thought to be environmentally persistent and, based on its physicochemical properties, would not be expected to leach to groundwater. Bioresmethrin is highly toxic to fish, aquatic invertebrates and honeybees. It as a low mammalian oral toxicity but may be a respiratory irritant.
Chemical Properties
Off-white to tan waxy solid or colorless crys-
tals. Chrysanthemum-like odor. Commercial products may
be dissolved in flammable organic solvents
Definition
A synthetic insecticide of the pyrethrin type. Biodegradable and has low toxicity, it is nonpersistent and can act as a synergist.
Mechanism of action
Contact action acting on the insects nervous system. Sodium channel modulator.
Safety Profile
Poison by intravenous route.Moderately toxic by ingestion. When heated todecomposition it emits acrid smoke and irritating fumes.A pesticide.
Synthesis
(1R, trans)-chrysanthemic acid (obtainable through the resolution of racemic chrysanthemic acid or asymmetric synthesis) reacts with thionyl chloride (SOCl₂) to convert into the more reactive chrysanthemic chlorohydrin. Subsequently, chrysanthemic chlorohydrin is esterified with 5-benzyl-3-furanol in the presence of anhydrous solvent (such as benzene or toluene) and organic base (such as pyridine or triethylamine). Finally, impurities are removed by washing with dilute acid and dilute base, and high-purity Bioresmethrin are obtained by vacuum distillation or column chromatography.
Potential Exposure
Resmethrin is pyrethroid insecticide
used for mosquito control (by aerial application) in the
USA, and may can also be used in greenhouses to control
white fly. Resmethrin is a synthetic Type I pyrethroid
insecticide registered for control of insects in residential,
commercial, and industrial settings, and in animal living
areas. It is also registered for use in food handling estab-
lishments and as a restricted use pesticide when used in
ULV spray to control adult mosquitoes in the interest of
public health . A United States Restricted Use Pesticide
(RUP) when formulated for use in mosquito abatement and
pest control treatments at nonagricultural sites. Restricted
due to extreme fish toxicity.
Shipping
UN3352 Pyrethroid pesticide, liquid toxic,
Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
UN3349 Pyrethroid pesticide, solid toxic, Hazard Class:
6.1; Labels: 6.1-Poisonous material
Incompatibilities
Decomposed by air, light, alkaline
media, and temperatures .175℃. May react violently with
strong oxidizers, bromine, 90% hydrogen peroxide, phos-
phorus trichloride, silver powders or dust. Incompatible
with silver compounds. Mixture with some silver
compounds forms explosive salts of silver oxalate.
Waste Disposal
Incineration would be an
effective disposal procedure where permitted. If an efficient
incinerator is not available, the product should be mixed with large amounts of combustible material and contact
with the smoke should be avoided. In accordance with
40CFR165. Follow recommendations for the disposal of
pesticides and pesticide containers . Bury in noncrop
land away from water. It would be better to mix the prod-
uct with lime. Incineration would be an effective disposal
procedure where permitted. If an efficient incinerator is not
available, the product should be mixed with large amount
of combustible material. Recommendable methods:
Hydrolysis, landfill, incineration, and open burning. Not
recommendable method: Discharge to sewer. Mix with saw-
dust and burn at a remote place .
Pesticide Type
Insecticide
