1,2,3,4-Tetrachloro-1,3-cyclopentadiene 1,2,3,4-Tetrachlorocyclopentadiene 1,3-CYCLOPENTADIENE, 1,2,3,4-TETRACHLORO- 2,3,4,5-Tetrachlorocyclopentadiene 695-77-2 NSC 18221 Tetrachlorocyclopentadiene