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CAS#: 7758-98-7 | Formula: CuSO4 | Specifications: Assay 98 % - Min, Calcium 0.01 % Max, Chloride 0.002 % Max, Insoluble matter 0.01 % Max, Iron 0.005 % Max, Loss on drying (105C) (%) 1 % Max, Nickel 0.005 % Max, Potassium 0.02 % Max, Sodium 0.05 % Max