> solvents that allow the semiconductor industry to function (because the periodic table has no replacement for the properties of a F-C bond). A lot (most?) of

> solvents that allow the semiconductor industry to function (because the periodic table has no replacement for the properties of a F-C bond). A lot (most?) of the usage of these in semiconductors is not as solvents--they are thermal transfer fluids being used like refrigerants. This usage of them is for keeping equipment at exactly some specific temperature. As such, the usage is mostly closed-cycle. One of the reasons for using these is that they replaced earlier chemicals that were chlorofluorocarbons--a Cl-C bond destroys ozone when it gets loose while an F-C bond simply doesn't come apart. While the end chemicals tend to be incredibly stable, the byproducts of manufacturing--not so much.