Ammonium sulfate is mainly used as a fertiliser and in purification of water. It is also used in the preparation of other ammonium salts. Ammonium sulfate is a white soluble crystalline solid, which has a chemical formulae (NH4)2SO4.
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Ammonium sulfate is used in many different applications. It has been used as a flame retardant, fertilizer, food additive, even in vaccines.