Appearance: white; AL2O3, ≥30 %; Basicity,40-85%; Water insoluble substance,≤0.3% PAC is a kind of inorganic macromolecule flocculant. Through the hydroxyl ion bridging function and the polyvalent anion polymeric function, it produces large molecular and high electricity inorganic macromolecule. It adapts a wide PH range of 5.0~9.0, and the best is between 6.5~7.6. 1) Purification of river water, lake water and underground water 2) Purification of industry water and industry recycling water. 3) Purification of waster water 4) Reclaiming coal from coal-washing waste water and kaolin in ceramic industry 5) Purification of the waste water in printing and dyeing industry, leather industry, brewage industry, meat-processing industry, coal-washing, metallurgy industry, mine, pharmacy, paper-making, and purification of the waste water containing fluorine, oil and heavy metals 6) Tannage and cloth cockling-prevent 7) Cement Solidifying, and moulding 8) Refining of pharmaceuticals, glycerine and sugar 9) Catalyzer carrier 10) Paper-making glue