1)Fermentation nitrogen source 2)Dyeing and printing auxiliaries 3)Be used as Beer Brewing Ammonium sulphate(Industrial premium grade)Appearance:White crystal without visible mechanical impuritiesNitrogen content(N):21.0% minWater content(H2O):0.2% maxFree acid(H2SO4):0.03%maxIron(Fe):0.007% maxArsenic(As):0.00005% maxHeavy metal(based on Pb):0.005% maxInsoluble substance in water:0.01% max