side effect of ferrous sulphate

{"title":"Effective Ferrous Sulphate Heptahydrate Powder For Water Flocculation Purification And Iron Salt Production","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/d6\/8c\/e447423b79763beac5f64bb86ef1-200x200-1.jpg","attrs":{"Price":"USD85\/Ton","Brand Name":"AOXINCHENG","Model Number":"Ferrous Sulfate Heptahydrate Power","Minimum Order Quantity":"27 Ton","Delivery Time":"7-10 Days","Place of Origin":"ShanDong\uff0cChina","Payment Terms":"L\/C, T\/T","Supply Ability":"20000Ton\/Year","Packaging Details":"Customized Packaging","Product Name":"Ferrous Sulfate Heptahydrate Power","Ferrous Sulfate(FeSO4)":"99.0% To 100.5% Or Not Less Than 92% Or 99.9%","Chloride (Cl)":"\u22640.005%","Sulfur(S)":"\u226511.5%","Lead (Pb)":"Not More Than 0.001% To 0.002%","Cadmium (Cd)":"Not More Than 0.001% To 0.003%","Arsenic (As)":"Not More Than 0.0002% To 0.005%","Crystal size":"0.1 ~ 1mm","Use":"Sewage treatment"}}