2 2 2 trifluoroethanol boiling point July 8, 2019 16 32 64 128 2 2 2-trifluoroethanol 2 2 2-trifluoroethyl formate 2 2 2-trifluoroethanol sigma 2 2 2-trifluoroethyl trifluoromethanesulfonate