(Antimony (III) Oxide) Sb2O3 M.W.291.50 Assay min 98.5% Chloride(Cl) max 0.05% Sulphate(SO4) max 0.05% Arsenic(As) max 0.06% Iron(Fe) max 0.005% Lead(Pb) max 0.05% Antimony oxide(Sb2O5) max 1.5%
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