Do you understand dichloromethane??

Introduction to dichloromethane

Dichloromethane is a colorless, transparent, highly soluble liquid that is heavier than water and volatile. It has an ether-like odor and sweet taste. It does not burn, but when mixed with high concentrations of oxygen, it forms an explosive mixture.

Dichloromethane is slightly soluble in water and is miscible with most commonly used organic solvents, and can also be miscible in any ratio with other oxygenated solvents, ether, and ethanol.

Dichloromethane can be quickly dissolved in phenol, aldehyde, ketone, glacial acetic acid, triethyl phosphate, formamide, cyclohexylamine, ethyl acetoacetate.

Main uses

Dichloromethane is used as a reaction medium in the pharmaceutical industry for the preparation of ampicillin, benzylpenicillin, and pioneer penicillin. It is also used as a solvent in film production, a petroleum dewaxing solvent, an aerosol propellant, an organic synthetic extractant, a foaming agent for polyurethane and other foam production, and a metal cleaning agent.

Dichloromethane is widely used in the manufacture of security film, polycarbonate, and other paint solvents, metal degreasing agents, aerosol sprays, polyurethane blowing agents, mold release agents, and paint strippers.

Dichloromethane is used as a refrigerant in industrial refrigeration systems, but it is very harmful. When it comes into contact with open flames or hot objects, it can produce highly toxic phosgene. In case of humid air, it can hydrolyze to produce trace amounts of hydrogen chloride, and light can also promote hydrolysis and increase the corrosiveness of metals.

Dichloromethane is a substance used in grain fumigation and decaffeinated coffee, as a solvent, extractant, mutagenic agent, and in plant studies.

Basic information

Handling and storage considerations

• Avoid fog droplets during operation and wear appropriate personal protective equipment.
• Avoid allowing released vapors and fog droplets to enter the air in the work area.
• Operate in a well-ventilated area and use minimal amounts.
• Emergency equipment ready to be used to fight fires and deal with leaks.
• Empty storage containers may still contain hazardous residues.
• Do not operate this object near welding, flame, or hot surfaces.
• Store in a cool, dry, well-ventilated place out of direct sunlight.
• Store away from heat sources, flames, and incompatible substances such as strong oxidizing agents, strong acids, and nitric acids.
• Store in appropriate labeled containers.
• Unused containers and empty drums should be tightly covered.
• Avoid damage to the container and regularly check the bucket for defects such as breakages or spills.
• Containers are galvanized or lined with Phenolic synthetic resin to reduce the likelihood of decomposition of dichloromethane.
• Limited storage.
• Post warning signs where appropriate.
• The storage area should be separated from the work area where the staff is dense, and access to the area should be restricted.
• Use plastic pipes that are specified to be usable for substances to unload toxins.
• Substances may accumulate static electricity that may cause combustion.
• Packaging, storage and transportation: airtight packaging in galvanized iron drums, 250kg per barrel, can be transported by train and car. It should be stored in a cold, dry, well-ventilated place, paying attention to moisture-proof.