Alum is both a specific chemical compound and a class of chemical compounds. The specific compound is the hydrated potassium aluminum sulfate (potassium alum)

More widely, alums are double sulfate salts

Aluminium sulfate is referred to as papermaker's alum. Although reference to this compound as alum is quite common in industrial communication, it is not regarded as technically correct. Its properties are quite different from those of the set of alums described above. Most industrial flocculation done with alum is actually aluminium sulfate.


Applications of Alum           

  • Industrial uses
  • Cosmetic
  • Culinary
  • Flame retardant
  • Chemical flocculant
  • Taxidermy
  • Medicine
  • Art