... %Heavy metals≤0.002%<0.002%Melting Point56-58°C56.3-57.5°CRelated substancesAny individual impurity:≤0.1%0.05 ... %(on anhydrous basis)99.84%Monochlorophenols≤50ppm8ppm2,4-Dichlorophenol≤10ppm3ppm1,3,7-Trichlorodibenzo-p-Dioxin≤0.25ppm0.08ppm2,8-Dichlorodibenzo-p ... ,8-Trichlorodibenzofuran≤0.5ppm0.24ppm 2,3,7,8-Tetrachloro dibenzo-p-Dioxin≤1ppt<1ppm2,3,7,8-Tetrachloro dibenzofuran≤1ppt<1ppm ...