PAC (Polyaluminium Chloride) abbreviate to the PAC. Often referred to aluminum chlorideor or mixing mud agent, which is a water-soluble inorganic polymers between ALCL3 and AL(OH) 3, the chemical formula is [AL2 (OH) NCL6- NLm] ,'m' refers to the extent of polymerization, 'n' stands for the neutral level of PAC products. The color often is yellow,light yellow, dark brown, dark gray resin-like solid. The product has a strong bridge adsorption properties, in the hydrolysis process, with the condensate, adsorption,precipitation processes and other physical and chemical.

The fundamental difference between PAC and the traditional inorganic coagulant is that traditional inorganic coagulant for the low molecular weight crystalline salt, and the structure of PAC is formed by complex multiple carboxyl,it has high speed of flocculation and sedimentation , for wide use of PH value, non-corrosive for plumbing, water purification effect is obvious, and can effectively support to clean the water-color quality SS, COD, BOD,arsenic, mercury and other heavy metal ions, which are widely used in drinking water, industrial water and wastewater treatment areas.