1,2-Benzenediol, 3,4,5,6-tetrachloro- 1198-55-6 3,4,5,6-Tetrachloro-1,2-benzenediol (9CI) 3,4,5,6-Tetrachlorocatechol 4-06-00-05620 (Beilstein Handbook Reference) BRN 1876366 CCRIS 4061 NSC 29027 Pyrocatechol, tetrachloro- TETRACHLOROCATECHOL Tetrachloro-1,2-benzenediol Tetrachloropyrocatechol Tetrachlorpyrokatechin [Czech] Tetrachlorpyrokatechol [Czech]