What are good substitutes for halogenated hydrocarbons that are no longer available?
Several common halogenated hydrocarbons have been phased out due to the Montreal Protocol on reducing chlorofluorocarbons that cause harm to the ozone layer. Chloroform, 1,1,1-trichloroethane, and 1,1,2-trichlorotrifluoroethane have been used for years in halogen experiments, denser-than-water demonstration, and extractions and are no longer available. Some substitutes for heavier-than-water, non-polar solvents are trichloroethylene, methylene chloride and perchloroethylene. Mineral oil or hexane work well for the halogen solubility experiment but are less dense than water.