PAC poly aluminium chloride yellow and white

Aluminum chlorohydrate is a group of specific aluminum salts  It is used in cosmetics as an antiperspirant and as a coagulant in water purification.

In water purification, this compound is preferred in some cases because of its high charge, which makes it more effective at destabilizing and removing suspended materials than other aluminum salts such as aluminum sulfate, aluminum chloride and various forms of polyaluminum chloride (PAC) and polyaluminum chlorisulfate, in which the aluminum structure results in a lower net charge than aluminum chlorohydrate