Process design

Montreal Protocol

The Montreal Protocol was designed to eliminate substances that deplete ozone by reaction with ozone (O3) in the stratosphere

  • Chlorofluorocarbons (CFCs) and Halons
  • Hydrochlorofluorocarbons (HCFCs) e.g. R22
  • Hydrobromofluorocarbons (HBFCs)
  • Carbon tetrachloride
  • Methyl chloroform (1,1,1-trichloroethane)
  • Methyl bromide
  • Bromochloromethane

The Montreal Protocol works by increasingly limiting supply rather than an outright ban. The use of listed substances as solvents or reagents should be avoided.