Product name: Aluminum Sulfate
Chemical formula: Al2 (SO4)3

Aluminum sulfate is a chemical compound called coagulant; completely soluble in water. It is slightly soluble in alcohols which can be ignored.

Analysis of Aluminum Sulfate

Chemical Properties of Aluminum Sulfate

Aluminum sulfate is volatile, non-flammable and toxic. It is used in treatment process for drinking water, wastewater and also paper production. It is also known by other names such as 17% aluminum sulfate, Alum Cake, Alum, traditional white alum and Aluminum salt.

Aluminum sulfate in nature (water)

The formulation of Aluminum Sulfate in dry form is Al2 (SO4)3

. Alum is a crystalline white solid with a sweet taste which has both powder and granular forms. Aluminum Sulfate solution in water has an acidic ph. Aluminum sulfate can be produced simply or double salt with potassium, ammonium or sodium. In this case, it is also called aluminum alum. Aluminum sulfate is prepared in two ways below:

  • Alum is produced from the reaction of sulfuric acid and aluminum hydroxide.

2Al(OH)3+3H2SO4 → Al2(SO4)3+6H2O

  • Aluminum Sulfate can also be produced by heating metal aluminum in sulfuric acid solution.

2Als+3H2SO4 → Al2(SO4)3+3H2

Due to the trivalent nature of aluminum ions, this material is used as a coagulant for coagulation and flocculation of colloidal particles and to control the growth of algae in swimming pools, lakes and wastewater treatment. Colloidal particles and impurities of water are bonded together by alum to form large particles. These particles settle after a while but do not pass through the filter. Aluminum sulfate can remove a high percentage of impurities from water.

Aluminum sulfate in nature (soil)

Soil contains nutrients that will be absorbed by plants, trees and shrubs. The soil has a lot of lime that prevents the plant from absorbing its essential nutrients. By adding aluminum sulfate, the absorption power of plants can be increased. Gardeners even use aluminum sulfate to increase soil acidity. Always make sure the soil is alkaline and calcareous. If the soil alkalinity is low, it becomes more acidic by adding alum and the excessive amount might damage the plant. When these products are combined with water, they are converted to aluminum hydroxide and sulfuric acid. There is a substance in the soil called calcium carbonate that keeps nutrient ions out of the plant’s reach and reduces their uptake by roots. Sulfates are used only in some plants due to some properties such as toxicity.


Aluminum sulfate in industry

  • To tighten dough
  • Clarifying light drinks
  • Controlling the pH level in beets, tomatoes and other vegetables
  • In Sugar Beet Filtration
  • As a kneading agent for cake mixes
  • Paper industry for the production of paper pulp
  • As a stabilizer in textile industry for fabric dyeing
  • Pharmacy to relieve and eliminate pain
  • Cosmetics such as antiperspirant
  • In the preparation of aluminum acetate drops
  • For coloring pure leather
  • Firefighting Foam
  • In order to produce aluminum salts, soaps and gels
  • To produce ethane as a catalyst
  • Glycerin production process
  • As an additive and improver of concrete in order to be waterproof
  • Construction industry for the production of gypsum foam
  • Production of baking soda
  • Pharmacy as a pharmaceutical raw material
  • In order to whiten the oil
  • Using it as a sugarcane molasses refiner in sugar production
  • Production of aluminum resins
  • Ink holder
  • Degreasing and deodorizing

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