Specification: Appearance White powder MgSO4 98% min MgO 32.66% min Mg 19.6% min Ferron(Fe) 0.0015% max Chloride(Cl) 0.014%max Heavy metal (Pb) 0.0008 %max Arsenic(As) 0.0002% max Water Insoluble 0.1% max.
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