polyaluminium chloride For drinking water treatment or wastewater treatment ... 29-30; Bacisity, 40-60; Water insoluble, less than 0.3% AL2O3, %, 29-32; Bacisity, 70-85; Water insoluble, ... 30; Bacisity, 40-60; Water insoluble, less than 0.3%: SO4 less than 7% Application: PAC is a kind ... ) Purification of industry water and industry recycling water. 3) Purification of waster water 4) Reclaiming coal from ...