... powder granular, soluble in water, alcohol, insoluble in water solution concentration cannot become acidic, mixing too low, generally for ... in paper making, water purification.2. widely used as mordant, tanning agents, pharmaceuticals astringent, wood preservatives, foam fire extinguishingagent, etc ... matter in water %≤0.3 0.3 PH (1% solution) %≥3.03.0 Granularity mm1515 High quality Aluminium sulfate