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Product Name Copper Sulfate Pentahydrate Batch No. QY-LSTP20230816 Molecular Formula CuSO4 5H2O Manufacturing Date 2023-08-16 CAS NO: 7758-99-8 Expiration Date 2028-08-15   Item Specification Result Assay CuSO4 ≥98% 98.99>%   Cu ≥ 25.06% 25.28% Appearance Blue powder Conforms Analytical Quality     Insoluble Residue ≤0.2% 0.12% Acidity(H2SO4) ≤0.2% 0.12% Total Heavy Metals     Lead(Pb) ≤10ppm 3.09ppm Arsenic(As) ≤4ppm 2.15ppm Cadmium(Cd) ≤0.1ppm Conforms Conclusion Conform with specification(food grade)     Shelf Life 60 months under the conditions above and in its original packaging.