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Empirical Formula (Hill Notation) CH3I
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Molecular Weight 141.94
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Beilstein Registry Number 969135
Methyl iodide, also called iodomethane,
and commonly abbreviated "MeI", is the chemical compound with the formula CH3I. It is a dense, colorless, volatile liquid. In terms of chemical structure, it is related to methane by replacement of one hydrogen atom by an atom of iodine. It is
naturally emitted by rice plantations in small amounts.
Detailed description
Use as a pesticide
Methyl iodide had also been proposed for use as a fungicide, herbicide, insecticide, nematicide, and as a soil disinfectant,
replacing methyl bromide (also known as bromomethane) (banned under the Montreal Protocol). Manufactured by Arysta
LifeScience and sold
under the brand name MIDAS, methyl iodide is registered as a pesticide in the
U.S., Mexico, Morocco, Japan, Turkey, and New Zealand and registration is
pending in Australia, Guatemala, Costa Rica, Chile, Egypt, Israel, South Africa
and other countries.[12]The first commercial
applications of MIDAS soil fumigant in California began in Fresno County, in
May, 2011.[citation needed]
The use of methyl iodide as a fumigant has drawn
concern. For example, 54 chemists and physicians contacted the U.S. EPA in a
letter, saying "We are skeptical of U.S. EPA’s conclusion that the high
levels of exposure to methyl iodide that are likely to result from broadcast
applications are 'acceptable' risks. U.S. EPA has made many assumptions about
toxicology and exposure in the risk assessment that have not been examined by
independent scientific peer reviewers for adequacy or accuracy. Additionally,
none of U.S. EPA’s calculations account for the extra vulnerability of the
unborn fetus and children to toxic insults."[13] EPA Assistant
Administrator Jim Gulliford replied saying, "We are confident that by
conducting such a rigorous analysis and developing highly restrictive
provisions governing its use, there will be no risks of concern," and in
October the EPA approved the use of methyl iodide as a soil fumigant in the United
States.
The California Department of Pesticide Regulation
(DPR) concluded that methyl iodide is "highly toxic," that "any
anticipated scenario for the agricultural or structural fumigation use of this
agent would result in exposures to a large number of the public and thus would
have a significant adverse impact on the public health", and that adequate
control of the chemical in these circumstances would be "difficult, if not
impossible."[14] Methyl iodide was
approved as a pesticide in California that December.[15] A lawsuit was filed
on January 5, 2011, challenging California's approval of methyl iodide.
Subsequently, the manufacturer withdrew the fumigant and requested that
California Department of Pesticide Regulation cancel its California
registration, citing its lack of market viability.
PRICE
$1593.48/KG OR $724.30/IB
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mobile: +2348039721941
contact person: emeaba uche
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