Aluminium Sulfate

HS Code : 28332210 | CAS NO. : 18475-35-9

General description:

Chemical Formula: Al2O12S3

Aluminum sulfate, a colourless salt obtained by the action of sulfuric acid on hydrated aluminum oxide. The commercial form is a hydrated crystalline solid.

Application & Usage:

  • It is used extensively in paper manufacture as a binder for dyes and as a surface filler.
  • Aluminium sulfate is used 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.
  • As a mordant in dyeing and printing textiles - 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.
  • In construction industry it is used as waterproofing agent and accelerator in concrete. Another use is a foaming agent in fire fighting foam.


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