Polyaluminium Chloride (PAC) is freely soluble in water and has quite strong ability to increase and enforce sedimentation, adsorption and agglutination during hydrolysis process. This product is mainly used to purify drinking water and treatment of industry waste water, such as the radioactive material and heavy metals such as lead, chromate, Arsenic, mercury and others in waste water. It is also widely used in precision casting, papermaking, tanning and some other fields.