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Potassium Aluminum Sulfate

water chemical called so4

Potassium aluminum sulfate is chemical which conforms to the general formula KAl(SO4)2. Also known as aluminum potassium sulfate, its unique characteristics have made it an important compound to many industries.

The commercial production of potassium aluminum sulfate is typically accomplished by a method called hydrometallurgy. In this process, an aqueous solution of sulfuric acid is first used to extract alumina (solid Al2O3) from an ore called bauxite. This step, known as leaching, results in a solution which can then be reacted with potassium sulfate to form potassium aluminum sulfate. Another method of production involves converting aluminum sulfate to potassium aluminum sulfate by adding potassium sulfate. In addition to these chemical processes, potassium aluminum sulfate is also found occurring naturally in minerals such as alunite and kalinite. Commercially available potassium aluminum sulfate is called potassium alum, potash alum, alum flour, or alum meal.

Potassium aluminum sulfate forms a solid, white powder at room temperature. It is a hygroscopic material which when exposed to air, hydrates (absorbs water). Depending on the amount of water molecules present, these hydrates are represented by the chemical formulas KAl(SO4)2 • 12H2O or K2SO4.Al2(SO4)3 • 24H2O. The powder form, made up of crystals, has a melting point of 198.5°F (92.5°C) and can be readily dissolved in water. Additionally, this material has a property known as astringency which is an ability to constrict body tissues, and restrict the flow of blood.

There have been many industrial applications of potassium aluminum sulfate. It is an important part of many products created by the pharmaceutical, cosmetic, and food industries because of its astringency property. It is also used in the manufacture of paper, dyes, glue, and explosives. Additionally, it helps in the water purification process, is used to speed up the hardening of concrete and plaster, and acts as a catalyst in various chemical reactions.

Potassium Hydrogen Tartrate - Properties, Production, Uses [next]

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almost 7 years ago

you can find AlK(SO4)2 in crystal growing kits. the one I have is a smithsonian crystal growing kit.

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almost 8 years ago

what is the pharmaceutical/medicinal use of potassium aluminium sulfate

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almost 8 years ago

What is potassium aluminum sulfate's solubility?

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almost 7 years ago

Where could you find potassium aluminum sulfate? Would it be available in any regular supermarket? Also, is it true that, if mixed with water, it can be used to fireproof an object, such as a cloth?

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almost 8 years ago

What is the freezing point of Aluminum Potassium Sulfate

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about 8 years ago

this web page on potassium aluminium sulphate was useful that it desciribes the bases of what the substance is and what it is used for and more but in simple terms

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almost 5 years ago

Dear sir/madam,

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about 5 years ago


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about 7 years ago

Can we use potassium aluminum sulfate as a preservative of fruits and vegetables?

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about 7 years ago

Many Asian grocery store carry these in the spice section or baking section.

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about 7 years ago

I need Potash Alum for tanning deer hides. I am having a difficult time in finding any.

Please reply

Thank you


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almost 4 years ago

This is David from Qinhuangdao Huanji Chemical Co.,Ltd , engaged in researching, producing and trading or exporting chemical products :

Inorganic Chemical Products

Aluminium Sulphate

Calcium Chloride

Sodium Hexametaposphate

Sodium Metabisulphite

Organic Chemical Products

Formic Acid

Glacial Acetic Acid

Oxalic Acid

Pigment Dyestuff

Carbon Black

Titanium Dioxide

Chrome Oxide Green

Iron Oxide


Caustic Soda Flake/Pearls


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9 months ago

What is the availability and price of this compound.

Where is it shipped from?