1,2,3,4,5-Pentachlorobenzene 4-05-00-00669 (Beilstein Handbook Reference) 608-93-5 BRN 1911550 Benzene, pentachloro- CCRIS 5927 EINECS 210-172-0 HSDB 2863 NSC 1857 PCB PENTACHLOROBENZENE QCB RCRA waste no. U183 RCRA waste number U183