1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin;1,2,3,4,7,8-Hexachlorodibenzo[1,4]dioxin; 1,2,3,4,7,8-Hexachlorodibenzo[b,e][1,4]dioxin;1,2,3,4,7,8-Hexachlorodibenzodioxin; 1,2,3,4,7,8-HxCDD; D 66; PCDD 66
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