1,2,3,4-TETRACHLOROBENZENE 4-05-00-00667 (Beilstein Handbook Reference) 634-66-2 AI3-01834 BRN 1910025 Benzene, 1,2,3,4-tetrachloro- CCRIS 5935 Caswell No. 825 EINECS 211-214-0 EPA Pesticide Chemical Code 061101 HSDB 4268 NSC 50729