Hexachloropropene1888-71-7100 % similar 1,1,2-Trichloro-3,3,3-trifluoro-1-propene431-52-745 % similar Tetrachloroethylene127-18-433 % similar Trichloroacetyl chloride76-02-833 % similar Hexachlorocyclopentadiene77-47-433 % similar Hexachloroacetone116-16-530 % similar 2,3-Dichloro-1,1,1,4,4,4-hexafluoro-2-butene303-04-830 % similar