... A,) molecular formula: ZnSO4 · 7 h2oB), the molecular weight of 287.54C),performance and use: heptahydrate (ZnSO4 · 7 h2o ... agent, prevent fruit tree plant diseases and insect pests of pesticides, medicine emetic, collagen clarification, preservatives, is also the ... important auxiliary raw material production of chemical fiber. In addition, also used in electroplating, ...