Skip to main content

Methyl Iodide Fumigant

 The fumigant market is classified into liquid, gaseous and solid. On the basis of type, the market is divided into metal potassium, 1,3 di-chloropropene, methyl bromide, metal sodium, chloropicrin, dazomet, methyl iodide, dimethyl disulfide, phosphine and other types. Depending on the application, the market is segmented into warehouse, crop based, soil, non crop based, vegetable field, cereal field and other applications.

 

Clearly, the farm industry needs a fumigant, but this chemical is not selective and would be more persistent in the environment than the more volatile methyl bromide, which admittedly needs to be replaced.

 

Methyl iodide appears as a colorless liquid that turns brown on exposure to light. Denser than water. Contact may irritate skin, eyes and mucous membranes. Very toxic by ingestion, inhalation and skin absorption.

 

Methyl iodide is a member of the class of iodomethanes that is methane in which one of the hydrogens is replaced by iodine. It has a role as a fumigant insecticide. It is a member of methyl halides and a member of iodomethanes.

 

Methyl iodide is one of the strongest alkylating agents known. As a result, its use raises serious health issues for all living organisms.

 


Comments

Popular posts from this blog

Difference Between Sulfate And Sulfonate In Shampoo

  Sulfates and sulfonates have two things in common. First, they're all anionic surfactants. Second, they are often used for personal care applications. But there are many differences. They have different molecular mechanisms. They have different functions and they have different raw materials.   Sulfates Sulfate is a compound. It has carbon bonds and oxygen and sulfur bonds. They include substances such as sodium lauryl sulfate and sodium lauryl ether sulfate.   At low pH, these substances plus the c-o-s bond hydrolyze to produce alcohol and inorganic sulfate. At a high pH, sulfate is stable in the base and, if ethoxylated to a relatively high level, produces a low-foaming alkali-soluble surfactant. Sulphates can be prepared by reaction of fatty alcohol or fatty alcohol ethoxylates with reagents such as SO3 or chlorosulfonic acid (CSA).   The reason shampoo becomes thick foam in the shower is that it contains sulfate. Most shampoos and household cleansers contain su...

How Is Ethyl Bromide Prepared From Ethyl Alcohol 2

  1. Preparation of ethyl bromide  from ethyl alcohol and hydrobromic acid Start with a 1-liter double neck round bottom flask with a drop funnel and wide bend. The bend is connected to a long and efficient condenser assembly and receiver for downward distillation. First, place 281ml (or 415 g) 48% hydrobromic acid in a flask, then add 65ml (or 120 g) of concentrated sulfuric acid in batches, while shaking. As it cools, a small quantity of 145ml (or 100 g) 95% ethanol is slowly added to the mixture of sulfuric acid and hydrobromic acid. Then 109ml (or 200g) of concentrated sulfuric acid is slowly added to the drop funnel, and the ethyl bromine obtained by slow distillation is collected in the cold receiver flask. The crude ethyl bromine was washed with equal volume of concentrated hydrochloric acid, then washed with water and a small amount of 5% sodium bicarbonate solution, then washed with water, and finally dried the ethyl bromine with anhydrous calcium chloride. The crude ...

What is Polyether Polyol

  Polyether polyol is prepared by ring-opening polymerization of epoxide monomers (such as ethylene oxide, propylene oxide and 1,2-epoxybutane) and a compound containing two or more active hydrogen atoms (called an initiator). In the presence of alkali catalyst, active hydrogen compounds initiate ring opening and oxide addition will continue until the required molecular weight is obtained. The number of hydroxyl groups in polyether polyol is determined by the number of unstable hydrogen atoms in the initiator. If the initiator has two active hydrogen, glycol will be formed. The reactivity of polyether polyol  to isocyanates depends on the initiator and the type of epoxy monomer that ends the ring-opening polymerization. The primary hydroxyl produced by polyol capped with ethylene oxide is more reactive than the secondary hydroxyl produced by propylene oxide, which is ideal for applications requiring rapid curing time. However, the use of initiator based on ethylene oxide and a...