... not poisonous, and has no corrosion. Powder is white. Both can be dissolved in water, but almost dissolved ... diameter(mm) <2 <2 <2insoluble soild in water ≤2 ≤2 ≤2molecular weight(ten thousand) 500- ... for petroleum, smelting, choosing mines, paper-making, textiles, sugar-making, cutting stones, chemical engineering, medicine and wastewater treatment etc. Polyacrylamide for water treatment and ...