This standard describes polyaluminum chloride (PACl) in aqueous (liquid) form for use in the treatment of potable water, wastewater, and reclaimed water.

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