1,2,3,6,7,9-Hexachlorodibenzo-p-dioxin;1,2,3,6,7,9-Hexachlorodibenzo[1,4]dioxin; 1,2,3,6,7,9-Hexachlorodibenzodioxin;1,2,3,6,7,9-HxCDD; 1,2,4,6,7,8-Hexachlorodibenzo-p-dioxin; PCDD 68
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