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General
  • Dichloromethane (DCM) or methylene chloride is the chemical compound with the formula CH2Cl2.
  • It is a colorless, volatile liquid with a moderately sweet aroma.
  • DCM is widely used as a solvent, the general view being that it is one of the less harmful of the chlorocarbons.

Process

  • Methylene chloride is produced either by the chlorination of methane, or by the hydrochlorination of methanol to methyl chloride with the subsequent chlorination of methyl chloride.
  • Oxyhydrochlorination, produces methylene chloride in addition to methyl chloride,is a potential beginning to a gas-to-liquid fuels process.

Application

  • DCM is widely used as a paint stripper and a degreaser.
  • Methylene Chloride is used to decaffeinate coffee and to prepare extracts of hops and other flavorings in the food industry.
  • DCM is used as an aerosol spray propellant and as a blowing agent for polyurethane foams.

Report

  • According to experts methylene chloride, leading to formal or informal measures against chlorinated substances.
  • Several industrial organisations tend to stress that particularly for the infrequent consumer exposures the risks of DCM are minimal, and that the alternative solvents are not as well researched.

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