USES: vitriolic is a widely used industrial reagent, usually with alum confusion. Alumina is often as flocculating agent, used for drinking water purification and sewage treatment equipment, and can also be used to in papermaking industry. Natural conditions, almost no water in aluminium salt forms exist. It will form a series of hydrate, including 16 water vitriolic is the most common. Alumina is also a very effective software animal pesticides, can kill Spain worm (Spanish) nose slugs. Used for water purification and textile aluminium in the printing and dyeing as medium. In the purification of water, it freezes, the impurities more easily precipitation and filtering. When dissolved in a neutral or the alkaline water, produce colloid precipitation aluminum hydroxide, Al (OH) 3. In printing and dyeing cloth, aluminum hydroxide colloid make dye more easily attached to plant fiber on top. Alumina is also used to adjust soil pH value, because it hydrolysis of aluminum hydroxide formation and produce a small number of sulfuric acid dilute solution.