Potassium alum, potash alum, or potassium aluminium sulfate is a chemical compound: the double sulfate of potassium and aluminium, with chemical formula KAl(SO4)2. It is commonly encountered as the dodecahydrate, KAl(SO4)2·12H2O
Amongst its fundamental properties you will find:
- Natural antiseptic
- Deodorant/Natural Antiperspirant
- Hydrolyser which is used in the tanning of fine hides and skins (sheep) and in the treatment of natural sausage casings
There are several synonyms to Potash Alum. The best known are: Alum of Rocca, Alunite, Kalinite, and other less known.
The product is in crystals or powder shape and it is suitable for a variety of uses. In ancient times the main uses were the fixing of colors on wool and the tanning of hides and skins with fur. Today, although the product has lost importance compared to the past, it still maintains a wide range of uses. In addition to the uses described above, cosmetics, food and floriculture sectors have been added to the list.