This standard describes ammonium sulfate for use in the treatment of potable water, wastewater, and reclaimed water. It can be referenced in documents for purchasing and receiving ammonium sulfate and can be used as a guide for testing the physical and chemical properties of ammonium sulfate samples. The stipulations of this standard apply when this document has been referenced and then only to ammonium sulfate used in the treatment of potable water, wastewater, and reclaimed water.