Dichlorodifluoromethane75-71-831 % similar Chlorotrifluoromethane75-72-931 % similar Tetrachloro-1,2-difluoroethane76-12-031 % similar Octafluoropropane76-19-731 % similar 1H,2H-Octafluorocyclopentane828-35-330 % similar