Magnesium Sulfate Anhydrous - 19.8% Mg 26% Sulfur - 50 Pounds

- Chemical Structure - MgSO4 - This is not Epsom Salt which is the heptahydrate form - Contains 19.8% Magnesium and 26% Sulfur - Mainly used in fertilzers but also has many other uses - Shipped in manufacturer's 50 lb bag by UPS ground.