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 This product is 20.5% nitrogen content, particle size 2-4 mm, BB fertilizer. A good nitrogen (commonly known as ammonium sulphate), suitable for general soil and crop, can make the branches and leaves growth, improve fruit quality and yield, enhance crops on disaster resistance ability, as a basic fertilizer, fertilizer and seed manure. Has double decomposition reaction with salt to produce ammonium chloride and ammonium aluminum sulfate effect generated alum, manufacturing refractory materials with boric acid and so on. Join the plating solution can increase the conductivity. Food caramel catalyst, cultivating nitrogen source of yeast in the production of yeast, help dyes, acid dyes leather dust remover. In addition, also used in beer brewing, chemical reagent and battery production, etc. Another important role is to mine rare earths, extraction with ammonium sulfate as raw material, adopts the ion exchange form of rare earth elements in the ore exchange, simple to collect leaching liquid filtration separation after dried into rare earth ore, per 1 ton of rare earth ore mining production need about 5 tons of ammonium sulfate.