First, the product name: (Chinese name) PAC (short poly aluminum) Also known as: flocculants, coagulants [English name] Polyaluminium Chloride, abbreviated PAC [Molecular formula] [AL2 (OH) LnCL6-n] m [ Technical Standards] product quality in line with national GB15892-2003 standard. Two main features: PAC compared with other coagulants, has the following advantages: wide range of applications, adapt aqueous extensive. Easy to quickly form large alum, precipitation good performance. Suitable for a wide range of PH value (5-9 rooms), and the treated water PH value and alkalinity down small. When water temperature is low, can still maintain a stable sedimentation effect. Basicity than other aluminum, iron is high, small erosion of the equipment. Third, the physical and chemical indicators: PAC is an inorganic polymer coagulant. Mainly through the compression layer, charge neutralization and adsorption, adsorption bridging, sediment netting mechanism of action, etc., so that fine particulates and colloidal ionic edema destabilization, aggregation, flocculation, coagulation, sedimentation, to purify the treatment effect