Also Called: 1,2,3,7,8-pentachlorodibenzo-p-dioxin (PnDD);1,2,3,7,8 Pentachlorodibenzo-p-dioxin;1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN;1,2,3,7,8- Pentachlorodibenzo-p-dioxin;1,2,3,7,8-Pentachlorodibenzodioxin;1 , 2 , 3 , 7 , 8-pentaclorodibenzo-p-dioxin;1,2,3,7,8 Pentachlorodibenzo-p-dioxin (PeCDD);1,2,3,7,8-pentaclorodibenzo-p-dioxin;1,2,3,7,8 Pentachlorodibenzodioxin;1,2,3,7,8-PeCDD