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Aluminum sulfate Features:
Aluminum sulfate is written as Al2(SO4)3 or Al2O12S3 . Aluminium sulfate is an industrial chemical used as a flocculating agent in the purification of drinking water and waste water treatment plants, and also in paper manufacturing.
Aluminium sulfate is sometimes incorrectly referred to as alum but alums are closely related compounds typified by KAl(SO4)2.12H2O. The anhydrous form occurs naturally as a rare mineral millosevichite, found i. e. in volcanic environments and on burning coal-mining waste dumps. Aluminium sulfate is rarely, if ever, encountered as the anhydrous salt. It forms a number of different hydrates, of which the hexadecahydrate Al2(SO4)316H2O and octadecahydrate Al2(SO4)318H2O are the most common. The heptadecahydrate, whose formula can be written as [Al(H2O)6]2(SO4)35H2O, occurs naturally as the mineral alunogen.
Aluminium sulfate may be made by dissolving aluminium hydroxide, Al(OH)3, in sulfuric acid, H2SO4:
2 Al(OH)3 + 3 H2SO4 -> Al2(SO4)36H2O
Aluminium sulfate Specification:
AL2O3% >= 15.6
Fe% <= 0.007
Insoluted in Water% <= 0.1
PH >= 3.0
AS% <= 0.0005
Heavy Metail (Pb) % <= 0.002
Aluminium Sulfate is used in water purification and as a mordant in dyeing and printing textiles. In water purification, it causes impurities to coagulate which are removed as the particulate settles to the bottom of the container or more easily filtered. This process is called coagulation or flocculation.
When dissolved in a large amount of neutral or slightly-alkaline water, aluminium sulfate produces a gelatinous precipitate of aluminium hydroxide, Al(OH)3. In dyeing and printing cloth, the gelatinous precipitate helps the dye adhere to the clothing fibers by rendering the pigment insoluble.
Aluminium sulfate is sometimes used to reduce the pH of garden soil, as it hydrolyzes to form the aluminium hydroxide precipitate and a dilute sulfuric acid solution.
Aluminium sulfate is the active ingredient of some antiperspirants; however, beginning in 2005 the US Food and Drug Administration no longer recognized it as a wetness reducer.
Aluminium sulfate is usually found in baking powder, where there is controversy over its use due to concern regarding the safety of adding aluminum to the diet.
In construction industry it is used as waterproofing agent and accelerator in concrete. Another use is a foaming agent in fire fighting foam.
It is also used in styptic pencils, and pain relief from stings and bites; it is the active ingredient in popular pain relief products such as Stingose.
It can also be very effective as a molluscicide, killing spanish slugs.
Aluminum sulfate Packing: Aluminum sulfate is packed In 25kg or 50kg woven bags with inner film.