A: We offer totally free stock samples under 1KG, if you want Exclusive samples, be sure to contact us and we could talk. Polyaluminum chloride is an rising water purification agent, predominantly composed of aluminum chloride powder and sulfuric acid. It is a water-soluble inorganic polymer coagulant involving aluminum chloride https://www.pac-pfs.com/product/drinking-grade-polyaluminium-chloride.html