1,2-Benzenediol, 3,4,6-trichloro- (9CI) 3,4,6-TRICHLOROCATECHOL 3,4,6-Trichloro-1,2-benzenediol 32139-72-3 4-06-00-05620 (Beilstein Handbook Reference) BRN 2261080 CCRIS 4056 Pyrocatechol, 3,4,6-trichloro-