Alum Chemical Compound

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A crystalline double sulfate usually encountered as the aluminum sulfate, also known as ammonium alum or just alum, is a which crystalline double sulfate usually encountered as the dodecahydrate, formula(NH4)Al(SO4)2·12H2O. It is used in small amounts in a variety of niche applications. The dodecahydrate occurs naturally as the rare mineral tschermigite.

Uses:

• It is used in water purification, in vegetable glues, in porcelain cements, in deodorants and in tanning, dyeing and in fireproofing textiles.
• The pH of the solution resulting from the topical application of ammonium alum with perspiration is typically in the slightly acid range, from 4 to 5.

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Non-ferric alum is the purer form of ammonium sulfate. It has no ferric ions in its chemical composition. This substance is manufactured using aluminum trihydrate as the raw material. The raw material is reacted with sulfuric acid under suitable conditions to produce non-ferric alum.

Non-ferric alum has 0.02-0.03% of insoluble matter by mass. Although it has no ferric ions, there can be iron in the form of Fe (around 0.004%). Non-ferric alum lacks the violet color in ferric alum. Instead, non-ferric alum is colorless. It is opaque.

on-ferric alum is soluble in water. Therefore it can be used as a chemical reagent for water purification. But there can be primary hazards for the environment. It is used as a chemical reagent in chemical analysis. Non-ferric alum is also used in paper manufacturing as a loading material.

The raw material used for manufacturing of non-ferric alum is aluminum trihydrate.

Non-ferric alum has about 0.004% of iron as Fe

Non-ferric alum has about 0.02-0.03% of insoluble matter.