Alum
Distributor
The most important alums are potassium aluminum sulfate, ammonium aluminum sulfate, and sodium aluminum sulfate. ... Potassium aluminum sulfate, also known as potassium alum or potash alum, has a molecular formula of K2(SO4)·Al2(SO4)3·24H2O or KAl(SO4)2·12H2O.
Uses of Alums
Alum has several household and industrial uses. Potassium alum is used most often, although ammonium alum, ferric alum, and soda alum may be used for many of the same purposes.
- purification of drinking water as a chemical flocculant
- in styptic pencil to stop bleeding from minor cuts
- pickling agent to help keep pickles crisp
- flame retardant
- the acidic component of some types of baking powder
- an ingredient in some depilatory (hair removal) waxes
- skin whitener
- ingredient in some brands of toothpaste.
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