Polyaluminum Chloride, abbreviated as PAC, is a new type of high-efficiency inorganic polymer coagulant. Polyaluminum Chloride is easily soluble in water and possesses strong bridging adsorption properties. During the hydrolysis process, it undergoes physical and chemical changes such as electrochemistry, coagulation, adsorption, and sedimentation. This product is primarily used for the purification of drinking water and the treatment of industrial wastewater, including that containing radioactive substances, highly toxic heavy metals like lead (Pb++) and chromium (Cr+6), and fluoride (F) contaminated water. Additionally, it has extensive applications in precision casting, papermaking, leather manufacturing, and other fields.