Product Information: CAS number 7446-20-0, EC index number 030-006-00-9, EC number 231-793-3, Grade ACS,ISO,Reag. Ph Eur, Hill Formula O₄SZn * 7 H₂O, Chemical formula ZnSO₄ * 7 H₂O, Molar Mass 287.54 g/mol, Physicochemical Information: Density 1.97 g/cm3, Melting Point 100 °C, pH value 4 - 6 (50 g/l, H₂O, 20 °C), Bulk density 800 - 1000 kg/m3, Solubility 965 g/l, flacon 500 g.