Tetrachloroethylene (${\mathrm{C}}_2\mathrm{C}{\mathrm{l}}_4$)

Tetrachloroethylene is $\mathrm{C}{\mathrm{l}}_2\mathrm{C}=\mathrm{CC}{\mathrm{l}}_2$, a chlorinated molecular liquid. Its four chlorine atoms supply a large chlorine inventory per molecule.

In the Homestake experiment, tetrachloroethylene served as a target for detecting solar neutrinos through a rare chlorine-to-argon nuclear transformation. The solvent's chemical identity determines the target inventory, while the observed conversion is a nuclear process.