1,2,4-TRICHLORODIBENZO-P-DIOXIN 1,2,4-Trichlorodibenzo-1,4-dioxin 1,2,4-Trichlorodibenzo-para-dioxin 1,2,4-Trichlorodibenzodioxin 39227-58-2 Dibenzo(b,e)(1,4)dioxin, 1,2,4-trichloro- Dibenzo-p-dioxin, 1,2,4-trichloro-