It is a Industry sewage(waste water) grade Polyaluminium Chloride, its solid appearance is Yellow or Red brown powder, it is a high-effective inorganic macromolecule flocculant. Its molecule is larger than usual inorganic flocculant. It is a subtance that between AL2OH3 and aluminium hydroxide, easy to be dissolved, the water solution is a kind of hydrolyzate, the colloid is with electric charge and could act hydroxylion bridging function to absorb the suspended sbustance.could act hydroxylion bridging function to absorb the suspended sbustance.