2E - 1,1,1-trichloroethane

1,1,1-trichloroethane is a chlorinated solvent once widely used in cleaning, degreasing and as a refrigerant, but it is listed under the Montreal Protocol because its release contributes to ozone layer depletion. The code 2E identifies it in the protocol's schedule of controlled substances, reflecting its phase-out and restricted use to limit atmospheric impacts.