... : 40% ~ 90% 2.Al2O3: 30% 3.Free samples 4.flocculant coagulant Spray light yellow PAC, Polyaluminium Chloride, abbreviated PAC[molecular formula ... of poly-aluminium chloride:1, water: domestic water, industrial water;2, urban wastewater treatment;3, sewage, sludge, industrial waste water treatment and sewage in the mass ...