Also Called: 1,2,3,7,8,9 Hexachlorodibenzo-p-dioxin;HEXACHLORODIBENZO-P-DIOXIN, MIXTURE (HXCDD);1 ,2,3,7,8,9-Hexachlorodibenzo-p-dioxin;1,2,3,7,8,9-hexachlorodibenzo-p-dioxin (HxDD);1,2,3,7,8,9 Hexachlorodibenzo-p-dioxin (HxCDD);1,2,3,7,8,9 Hexachlorodibenzop-dioxin;1,2,3,7,8,9-Hexachlorodibenzo-p-dioxin;1,2,3,7,8,9-HxCDD