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PAC-Polyaluminium Chloride 
PAC, short for Polyaluminium Chloride, is also referred to as alkaline aluminium chloride or coagulant, etc. It is water-soluble inorganic high polymer between ALCL3 and AL (OH) 3. 

This products manufactured through changing the structure and from distribution of polymer by special production process during producing polyaluminum chloride; Its high molecular weight reinforces the capability of charge neutralization and bridge absorption towards the negativecharged colloid. It has relatively good properties of bridging absorption and physicochemical processes, such as coagulation, adsorption and sedimentation, may occur during hydrolytic process. It is a harmless inorganic composite coagulant with macromolecule, and is the ideal chemical to treat low-temperature, low-turbidity and heavily organic-polluted water. 

Properties and Advantages 

1. Its purifying effect on low-temperature, low-turbidity and heavily organic-polluted raw water is much better than other organic flocculant, furthermore, the treatment cost is lowered by 20%-80%. 
2. It can lead to quick formation of folc (epecially at low temperature) with big size and rapid precipitation service life of cellular filter of sedimentation basin. 
3. The dosage is smaller than that of other flocculants, which is better for improving the quality of treated water. 
4. It has widerange adaptability to the waters at different temperatures (in the summer and the winter) and at different regions. 

Mainly usage 

1) City water purification: Rivers water, water, groundwater reservoir. 
2) Purification of water for industrial supply. In the industrial production, used in paper sizing, printing and dyeing, bleaching, dyeing and cement the accelerating, the precision casting stiffening agent, fireproof material adhesives, glycerin refined, sugar refining, cloth anticreasing liquid, medicine, cosmetics, and other industries, making the wastewater recycling. 
3) Urban sewage treatment and mud treatment, Raw material of cosmetics, Catalyst carrier, coating material in paper-making 

Specifications (GB 15892-2009) 

1) Al2O3: 29% (min. ) 
2) Basicity: 50.0% ~ 85.0% 
3) Insolubles: 1.0% (max. ) 
4) pH (1% water solution): 3.5 ~ 5.0 
5) Pb: 0.001%(max. ) 

6) As: 0.0002% (max. ) 
7) Mn: 0.045% (max. ) 
8) Cr6+: 0.0005% (max. ) 
9) Hg: 0.00001% (max. ) 
10) CD: 0.0002% (max. )