1. nongenotoxic receptor-mediated mecha- the mechanisms of atmospheric degrada
2. nisms involving cell proliferation (72-74); tion the contribution of released fluoride
3. however an increased cell proliferation in from these compounds to total atmos
4. the liver could not be demonstrated after pheric flux is calculated to be very low. The
5. months of HCFC-123 exposure in rats. formation of hydrochloric and hydrofluoric