1-Hydroxy-2,3,4,6-tetrachlorobenzene 2,3,4,6-Tetrachlorophenol 2,4,5,6-Tetrachlorophenol 58-90-2 Chlorophenols Dowicide 6 NSC2428 Phenol, 2,3,4,6-tetrachloro- TCP WLN: QR BG CG DG FG