Formula: ZnSO₄ • 7H₂O CAS: 7446-20-0 EC No.: 231-793-3 M (Molar Mass): 287.56 g/mol D (Density): 1.97 g/cm³ mp (Melting Point): 100°C (loses water) Appearance: Colorless transparent crystals or white granules.

Assay (Complexometric as ZnSO₄•7H₂O): ≥ 99.0 % Appearance: Colorless crystals or white granules. Solubility (in water): Clear, colorless solution. Insoluble Matter: ≤ 0.01 % Loss on Drying (280°C): 42.0 - 45.0 % (theoretical ~43.9%) Chloride (Cl): ≤ 0.002 % Sulfate (SO₄): As per stoichiometry. Iron (Fe): ≤ 0.001 % Heavy Metals (as Pb): ≤ 0.001 %