Trifluoroacetaldehyde ethyl hemiacetal433-27-232 % similar 3,3,4,4,4-Pentafluoro-2-butanol374-40-330 % similar 2H-Hexafluoro(2-methylpropanoic acid)564-10-330 % similar 1-Chloro-1,2,2,2-tetrafluoroethane2837-89-030 % similar