Generally refers to said aluminum sulfate is a white flaky kind of aluminum sulfate, 18 light green hydrated aluminum sulfate [Al2 (SO4) 3 · 18H2O], the latter a lower aluminum content, not influence the main impurities of aluminum sulfate manufacturers, as long as the aluminum content had little effect in an appropriate range of iron-free aluminum sulfate Edit product as a white solid granular or massive, shiny white crystals. Stability in the air. Lose some crystal water at 86.5 ℃, 250 ℃ lose all crystal water. When heated violent swell and become spongy substance. Decomposition of sulfur trioxide and aluminum oxide when burned red hot. Weathered When the relative humidity of about 25%. Soluble in water, practically insoluble in ethanol, the solution is acidic. After boiling has long insoluble basic salt precipitation. The relative density of 1.62. No iron aluminum sulfate is a widely used industrial reagent is usually with alum (aluminum potassium sulfate dodecahydrate both) confusion. Aluminum sulfate is often used as flocculants for purifying drinking water and sewage treatment equipment which liquid aluminum sulfate, also used in the paper industry. Chemical Properties edit chemicals: inorganic sulfate - Chemical formula: Al2 (SO4) 3 Molecular Weight: 342.43 Relative density (water = 1): 2.71 Quality Indicator Editor alumina mass fraction /% ≥ 17.00 15.80 15.60 Iron ( Fe) /% ≤ 0.010 0.30 0.40 Water Insoluble /% ≤ 0.10 0.10 0.20pH value (1% aqueous) ≥ 3.0 3.0 3.0 Hazards editor health hazards: the eyes, mucous membranes have a stimulating effect. Swallowed a large number of aluminum sulfate to the mouth and the stomach produces a stimulating effect. Explosion hazard: This product is flammable aluminum sulfate, irritating. Edit aid measures Skin contact: remove contaminated clothing, mobile water rinse. Eye contact: Did eyelid, with the flowing water or saline. Medical treatment. Inhalation: from the scene to fresh air. If breathing is difficult, give oxygen. Medical treatment. Ingestion: drink enough water, the symptoms. Medical treatment.