1,2,3,6,7,9-HEXACHLORODIBENZO-P-DIOXIN 1,2,3,6,7,9-Hexachlorodibenzo-para-dioxin 1,2,3,6,7,9-Hexachlorodibenzodioxin 1,2,3,6,7,9-HxCDD 64461-98-9 BRN 5119561 Dibenzo(b,e)(1,4)dioxin, 1,2,3,6,7,9-hexachloro- Dibenzo-p-dioxin, 1,2,3,6,7,9-hexachloro-