1,2,3,4,7-PENTACHLORODIBENZO-P-DIOXIN 1,2,3,4,7-Pentachlorodibenzo-para-dioxin 1,2,3,4,7-Pentachlorodibenzodioxin 39227-61-7 BRN 5114377 Dibenzo-p-dioxin, 1,2,3,4,7-pentachloro-