1,2,3,4,5-Pentachlorocyclopentadiene 1,3-Cyclopentadiene, 1,2,3,4,5-pentachloro- 25329-35-5 4-05-00-00380 (Beilstein Handbook Reference) BRN 1940651 Cyclopentadiene, 1,2,3,4,5-pentachloro- (6CI,7CI) Pentachloro-2,4-cyclopentadien-1-yl Pentachlorocyclopentadiene