... industrial goods for white to light yellow crystals.Nitrogen (N) content: 21.0% minMoisture: 0.2 MaxFree acid: 0.05 ... (water = 1) : 1.77USE 1 .Ammonium sulfate mainly used as fertilizer, applicable to all kinds of soil and crop ... concentration purification, and filtration, crystallization, centrifugal separation, cooling, drying system. Used as food additives, make the dough regulator, yeast oxygen. 4 ...