Dongying Rich Chemical Co.,Ltd

Dongying Rich Chemical Co.,Ltd

What is the stability and harm of dichloromethane, do you know?
  • Dichloromethane has the advantages of strong dissolving power and low toxicity, and is widely used in the manufacture of safe film and polycarbonate. The other is used as paint solvent, metal degreasing agent, air smoke propellant, polyurethane foaming agent, releasing agent, Paint agent.


  •   methylene chloride
  • Dichloromethane  as a colorless liquid, in the pharmaceutical industry as a reaction medium for the preparation of ampicillin, ampicillin and cephalosporin, etc .; also used as film production solvent, oil dewaxing solvent, aerosol propellant, Organic synthesis extractant, polyurethane and other foam production of foaming agent and metal cleaning agent.

  • A compound in which two hydrogen atoms in a methane molecule are replaced by chlorine. Dichloromethane is colorless, transparent, watery, volatile liquid, has a similar ether odor and sweetness, does not burn, but mixes with high concentrations of oxygen to form an explosive mixture. Dichloromethane dissolved in water, with the vast majority of commonly used organic solvents miscible, and other chlorine solvents, ether, ethanol can also be any proportion of miscible.

  • Dichloromethane can be quickly dissolved in phenol, aldehydes, ketones, glacial acetic acid, triethyl phosphate, formamide, cyclohexylamine, ethyl acetoacetate. Pure dichloromethane without flash point, containing an equal volume of dichloromethane and gasoline, solvent naphtha or toluene solvent mixture is not flammable, but when the dichloromethane and acetone or methanol liquid in a 10: 1 ratio of mixing, The mixture has a flash point, the vapor and air to form an explosive mixture, the explosion limit of 6.2% to 15.0% (volume). Dichloromethane is the least toxic to methane chloride, and its toxicity is only 0.11% of the carbon tetrachloride toxicity. If the dichloromethane directly splashed into the eyes, there is pain and corrosion. The steam of methylene chloride has an anesthetic effect. When a serious risk of poisoning should be immediately out of contact and moved to fresh air, some symptoms of poisoning will be alleviated or disappeared, will not cause lasting damage.

  • Health hazards: the goods have anesthetic effect, the main damage to the central nervous system and respiratory system. The main way of human contact is inhalation. It has been measured that in the indoor production environment, when the use of dichloromethane as paint remover, there is a high concentration of dichloromethane. The general population through the surrounding air, drinking water and food contact, the dose is much lower. It is estimated that about 80% of the world's production of methylene chloride is released into the atmosphere, but because of the rapid rate of photolysis of the compound, it is impossible to accumulate in the atmosphere. The initial degradation products for the phosgene and carbon monoxide, and then into carbon dioxide and hydrochloric acid. When dichloromethane is present in surface water, most of it will evaporate. In the presence of oxygen, it is biodegradable, and bioaccumulation seems unlikely. But its behavior in the soil still have to be determined.

Copyright © Dongying Rich Chemical Co.,Ltd. All rights reserved.
QR Code