2,3,5,6-Tetrachlorophenetole 3-Ethoxy-1,2,4,5-tetrachlorobenzene 6936-41-0 AI3-22332 Benzene, 1,2,4,5-tetrachloro-3-ethoxy- Benzene, 3-ethoxy-1,2,4,5-tetrachloro- NSC 21475 Phenatole, 2,3,5,6-tetrachloro- (6CI)