1. In turn, 1,1,1-trichloroethane itself is now being replaced by other solvents in the laboratory.

2. A somewhat smaller amount of 1,1,1-trichloroethane is produced from the reaction of vinylidene chloride and hydrogen chloride in the presence of an iron(III) chloride catalyst: CH2=CCl2 + HCl → CH3CCl3 1,1,1-Trichloroethane is sold with stabilizers because it is unstable with respect to dehydrochlorination and attacks some metals.

3. This activity will demonstrate the concepts of bioaccumulation and Biomagnifications using the classic example of DDT (dichloro-diphenyl-trichloroethane), as well as review how energy is transferred through a food chain.

4. The 1,1-dichloroethane is then converted to 1,1,1-trichloroethane by reaction with chlorine under ultraviolet irradiation: CH3CHCl2 + Cl2 → CH3CCl3 + HCl This reaction proceeds at 80-90% yield, and the hydrogen chloride byproduct can be recycled to the first step in the process.